1211022210220 has 48 divisors (see below), whose sum is σ = 2558973666816. Its totient is φ = 481399200000.

The previous prime is 1211022210193. The next prime is 1211022210221. The reversal of 1211022210220 is 220122201121.

It is a happy number.

It is a super-2 number, since 2×1211022210220² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211022210194 and 1211022210203.

It is not an unprimeable number, because it can be changed into a prime (1211022210221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3744970 + ... + 4055470.

It is an arithmetic number, because the mean of its divisors is an integer number (53311951392).

Almost surely, 2^{1211022210220} is an apocalyptic number.

1211022210220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211022210220 is an abundant number, since it is smaller than the sum of its proper divisors (1347951456596).

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

1211022210220 is a wasteful number, since it uses less digits than its factorization.

1211022210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311722 (or 311720 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1211022210220 its reverse (220122201121), we get a palindrome (1431144411341).

Subtracting from 1211022210220 its reverse (220122201121), we obtain a palindrome (990900009099).

The spelling of 1211022210220 in words is "one trillion, two hundred eleven billion, twenty-two million, two hundred ten thousand, two hundred twenty".