20102112122 has 4 divisors (see below), whose sum is σ = 30153168186. Its totient is φ = 10051056060.

The previous prime is 20102112109. The next prime is 20102112131. The reversal of 20102112122 is 22121120102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22121120102 = 2 ⋅11060560051.

It can be written as a sum of positive squares in only one way, i.e., 13019038201 + 7083073921 = 114101^2 + 84161^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20102112097 and 20102112106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5025528029 + ... + 5025528032.

Almost surely, 2^20102112122 is an apocalyptic number.

20102112122 is a deficient number, since it is larger than the sum of its proper divisors (10051056064).

20102112122 is a wasteful number, since it uses less digits than its factorization.

20102112122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10051056063.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20102112122 its reverse (22121120102), we get a palindrome (42223232224).

The spelling of 20102112122 in words is "twenty billion, one hundred two million, one hundred twelve thousand, one hundred twenty-two".