22211211212120 has 64 divisors (see below), whose sum is σ = 58329746196480. Its totient is φ = 7453245338496.

The previous prime is 22211211212111. The next prime is 22211211212159. The reversal of 22211211212120 is 2121211211222.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22211211212092 and 22211211212101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 843877844 + ... + 843904163.

It is an arithmetic number, because the mean of its divisors is an integer number (911402284320).

Almost surely, 2^{22211211212120} is an apocalyptic number.

22211211212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22211211212120 is an abundant number, since it is smaller than the sum of its proper divisors (36118534984360).

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

22211211212120 is a wasteful number, since it uses less digits than its factorization.

22211211212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1687782072 (or 1687782068 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22211211212120 its reverse (2121211211222), we get a palindrome (24332422423342).

The spelling of 22211211212120 in words is "twenty-two trillion, two hundred eleven billion, two hundred eleven million, two hundred twelve thousand, one hundred twenty".