20111431102 has 32 divisors (see below), whose sum is σ = 35632871424. Its totient is φ = 8330839200.

The previous prime is 20111431063. The next prime is 20111431129. The reversal of 20111431102 is 20113411102.

It is a congruent number.

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, 328093 + ... + 384535.

It is an arithmetic number, because the mean of its divisors is an integer number (1113527232).

Almost surely, 2^20111431102 is an apocalyptic number.

20111431102 is a deficient number, since it is larger than the sum of its proper divisors (15521440322).

20111431102 is a wasteful number, since it uses less digits than its factorization.

20111431102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57304.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20111431102 its reverse (20113411102), we get a palindrome (40224842204).

The spelling of 20111431102 in words is "twenty billion, one hundred eleven million, four hundred thirty-one thousand, one hundred two".