1201122022212 has 144 divisors (see below), whose sum is σ = 3551282646912. Its totient is φ = 335132743680.

The previous prime is 1201122022211. The next prime is 1201122022259. The reversal of 1201122022212 is 2122202211021.

It is a happy number.

It is a super-2 number, since 2×1201122022212² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1201122022211) 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 47 ways as a sum of consecutive naturals, for example, 101603262 + ... + 101615082.

It is an arithmetic number, because the mean of its divisors is an integer number (24661685048).

Almost surely, 2^{1201122022212} is an apocalyptic number.

1201122022212 is a gapful number since it is divisible by the number (12) 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 1201122022212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1775641323456).

1201122022212 is an abundant number, since it is smaller than the sum of its proper divisors (2350160624700).

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

1201122022212 is a wasteful number, since it uses less digits than its factorization.

1201122022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21258 (or 21253 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1201122022212 its reverse (2122202211021), we get a palindrome (3323324233233).

The spelling of 1201122022212 in words is "one trillion, two hundred one billion, one hundred twenty-two million, twenty-two thousand, two hundred twelve".