21100122222522 has 32 divisors (see below), whose sum is σ = 48536040941952. Its totient is φ = 5990207580864.

The previous prime is 21100122222521. The next prime is 21100122222523. The reversal of 21100122222522 is 22522222100112.

It is an interprime number because it is at equal distance from previous prime (21100122222521) and next prime (21100122222523).

It is a junction number, because it is equal to n+sod(n) for n = 21100122222492 and 21100122222501.

It is not an unprimeable number, because it can be changed into a prime (21100122222521) 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, 1599942013 + ... + 1599955200.

It is an arithmetic number, because the mean of its divisors is an integer number (1516751279436).

Almost surely, 2^{21100122222522} is an apocalyptic number.

21100122222522 is an abundant number, since it is smaller than the sum of its proper divisors (27435918719430).

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

21100122222522 is a wasteful number, since it uses less digits than its factorization.

21100122222522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199897382.

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 21100122222522 its reverse (22522222100112), we get a palindrome (43622344322634).

The spelling of 21100122222522 in words is "twenty-one trillion, one hundred billion, one hundred twenty-two million, two hundred twenty-two thousand, five hundred twenty-two".