20111204102 has 64 divisors (see below), whose sum is σ = 35220987648. Its totient is φ = 8511360000.

The previous prime is 20111204083. The next prime is 20111204123. The reversal of 20111204102 is 20140211102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29445053 + ... + 29445735.

It is an arithmetic number, because the mean of its divisors is an integer number (550327932).

Almost surely, 2^20111204102 is an apocalyptic number.

20111204102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20111204102 is a deficient number, since it is larger than the sum of its proper divisors (15109783546).

20111204102 is a wasteful number, since it uses less digits than its factorization.

20111204102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445.

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

Adding to 20111204102 its reverse (20140211102), we get a palindrome (40251415204).

The spelling of 20111204102 in words is "twenty billion, one hundred eleven million, two hundred four thousand, one hundred two".