21200122111122 has 48 divisors (see below), whose sum is σ = 47932436867328. Its totient is φ = 6759215812800.

The previous prime is 21200122111117. The next prime is 21200122111171. The reversal of 21200122111122 is 22111122100212.

It is a super-2 number, since 2×21200122111122² (a number of 27 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 21200122111095 and 21200122111104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10767303 + ... + 12583125.

It is an arithmetic number, because the mean of its divisors is an integer number (998592434736).

Almost surely, 2^{21200122111122} is an apocalyptic number.

21200122111122 is an abundant number, since it is smaller than the sum of its proper divisors (26732314756206).

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

21200122111122 is a wasteful number, since it uses less digits than its factorization.

21200122111122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844055 (or 1844052 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21200122111122 its reverse (22111122100212), we get a palindrome (43311244211334).

The spelling of 21200122111122 in words is "twenty-one trillion, two hundred billion, one hundred twenty-two million, one hundred eleven thousand, one hundred twenty-two".