22100012121 has 64 divisors (see below), whose sum is σ = 34401024000. Its totient is φ = 12471782400.

The previous prime is 22100012111. The next prime is 22100012161. The reversal of 22100012121 is 12121000122.

It is not a de Polignac number, because 22100012121 - 2⁶ = 22100012057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22100012097 and 22100012106.

It is not an unprimeable number, because it can be changed into a prime (22100012111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35023476 + ... + 35024106.

It is an arithmetic number, because the mean of its divisors is an integer number (537516000).

Almost surely, 2^22100012121 is an apocalyptic number.

It is an amenable number.

22100012121 is a deficient number, since it is larger than the sum of its proper divisors (12301011879).

22100012121 is a wasteful number, since it uses less digits than its factorization.

22100012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 22100012121 its reverse (12121000122), we get a palindrome (34221012243).

It can be divided in two parts, 2210001 and 2121, that added together give a palindrome (2212122).

The spelling of 22100012121 in words is "twenty-two billion, one hundred million, twelve thousand, one hundred twenty-one".