20100021122 has 16 divisors (see below), whose sum is σ = 30331514040. Its totient is φ = 9989661312.

The previous prime is 20100021059. The next prime is 20100021157. The reversal of 20100021122 is 22112000102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14859853801 + 5240167321 = 121901^2 + 72389^2 .

It is a super-2 number, since 2×20100021122² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244958 + ... + 316550.

Almost surely, 2^20100021122 is an apocalyptic number.

20100021122 is a deficient number, since it is larger than the sum of its proper divisors (10231492918).

20100021122 is a wasteful number, since it uses less digits than its factorization.

20100021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72437.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20100021122 its reverse (22112000102), we get a palindrome (42212021224).

The spelling of 20100021122 in words is "twenty billion, one hundred million, twenty-one thousand, one hundred twenty-two".