20112111010 has 32 divisors (see below), whose sum is σ = 36965765232. Its totient is φ = 7876684800.

The previous prime is 20112110989. The next prime is 20112111109. The reversal of 20112111010 is 1011121102.

It can be written as a sum of positive squares in 8 ways, for example, as 5099245281 + 15012865729 = 71409^2 + 122527^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 541 + ... + 200560.

Almost surely, 2^20112111010 is an apocalyptic number.

20112111010 is a deficient number, since it is larger than the sum of its proper divisors (16853654222).

20112111010 is a wasteful number, since it uses less digits than its factorization.

20112111010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201318.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20112111010 its reverse (1011121102), we get a palindrome (21123232112).

The spelling of 20112111010 in words is "twenty billion, one hundred twelve million, one hundred eleven thousand, ten".