22121122211220 has 48 divisors (see below), whose sum is σ = 61941142932480. Its totient is φ = 5898775376256.

The previous prime is 22121122211203. The next prime is 22121122211231. The reversal of 22121122211220 is 2211222112122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4076727 + ... + 7801406.

It is an arithmetic number, because the mean of its divisors is an integer number (1290440477760).

Almost surely, 2^{22121122211220} is an apocalyptic number.

22121122211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121122211220 is an abundant number, since it is smaller than the sum of its proper divisors (39820020721260).

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

22121122211220 is a wasteful number, since it uses less digits than its factorization.

22121122211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11909184 (or 11909182 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22121122211220 its reverse (2211222112122), we get a palindrome (24332344323342).

The spelling of 22121122211220 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, two hundred twenty".