20112121110 has 32 divisors (see below), whose sum is σ = 50809570560. Its totient is φ = 5080956768.

The previous prime is 20112121087. The next prime is 20112121111. The reversal of 20112121110 is 1112121102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112121111) 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, 17641642 + ... + 17642781.

It is an arithmetic number, because the mean of its divisors is an integer number (1587799080).

Almost surely, 2^20112121110 is an apocalyptic number.

20112121110 is an abundant number, since it is smaller than the sum of its proper divisors (30697449450).

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

20112121110 is a wasteful number, since it uses less digits than its factorization.

20112121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35284452.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20112121110 its reverse (1112121102), we get a palindrome (21224242212).

The spelling of 20112121110 in words is "twenty billion, one hundred twelve million, one hundred twenty-one thousand, one hundred ten".