1212022200220 has 96 divisors (see below), whose sum is σ = 2753664258240. Its totient is φ = 445457633280.

The previous prime is 1212022200211. The next prime is 1212022200229. The reversal of 1212022200220 is 220022202121.

It is an interprime number because it is at equal distance from previous prime (1212022200211) and next prime (1212022200229).

It is a super-2 number, since 2×1212022200220² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212022200194 and 1212022200203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212022200229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67105551 + ... + 67123609.

It is an arithmetic number, because the mean of its divisors is an integer number (28684002690).

Almost surely, 2^{1212022200220} is an apocalyptic number.

1212022200220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212022200220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1376832129120).

1212022200220 is an abundant number, since it is smaller than the sum of its proper divisors (1541642058020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212022200220 is a wasteful number, since it uses less digits than its factorization.

1212022200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19255 (or 19253 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 1212022200220 its reverse (220022202121), we get a palindrome (1432044402341).

The spelling of 1212022200220 in words is "one trillion, two hundred twelve billion, twenty-two million, two hundred thousand, two hundred twenty".