21400131424124 has 12 divisors (see below), whose sum is σ = 37465840776000. Its totient is φ = 10695605488128.

The previous prime is 21400131424109. The next prime is 21400131424157. The reversal of 21400131424124 is 42142413100412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1115045189 + ... + 1115064380.

It is an arithmetic number, because the mean of its divisors is an integer number (3122153398000).

Almost surely, 2^{21400131424124} is an apocalyptic number.

It is an amenable number.

21400131424124 is a deficient number, since it is larger than the sum of its proper divisors (16065709351876).

21400131424124 is a wasteful number, since it uses less digits than its factorization.

21400131424124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230111972 (or 2230111970 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 21400131424124 its reverse (42142413100412), we get a palindrome (63542544524536).

The spelling of 21400131424124 in words is "twenty-one trillion, four hundred billion, one hundred thirty-one million, four hundred twenty-four thousand, one hundred twenty-four".