21131231124102 has 32 divisors (see below), whose sum is σ = 46237370327424. Its totient is φ = 6384949752000.

The previous prime is 21131231124079. The next prime is 21131231124121. The reversal of 21131231124102 is 20142113213112.

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, 461317399 + ... + 461363202.

It is an arithmetic number, because the mean of its divisors is an integer number (1444917822732).

Almost surely, 2^{21131231124102} is an apocalyptic number.

21131231124102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21131231124102 is an abundant number, since it is smaller than the sum of its proper divisors (25106139203322).

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

21131231124102 is a wasteful number, since it uses less digits than its factorization.

21131231124102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922680964.

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 21131231124102 its reverse (20142113213112), we get a palindrome (41273344337214).

The spelling of 21131231124102 in words is "twenty-one trillion, one hundred thirty-one billion, two hundred thirty-one million, one hundred twenty-four thousand, one hundred two".