21142111230400 has 42 divisors (see below), whose sum is σ = 52022807450240. Its totient is φ = 8456844491520.

The previous prime is 21142111230313. The next prime is 21142111230431. The reversal of 21142111230400 is 403211124112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6606908160 + ... + 6606911359.

Almost surely, 2^{21142111230400} is an apocalyptic number.

21142111230400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21142111230400 is an abundant number, since it is smaller than the sum of its proper divisors (30880696219840).

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

21142111230400 is a wasteful number, since it uses less digits than its factorization.

21142111230400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13213819541 (or 13213819526 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 21142111230400 its reverse (403211124112), we get a palindrome (21545322354512).

The spelling of 21142111230400 in words is "twenty-one trillion, one hundred forty-two billion, one hundred eleven million, two hundred thirty thousand, four hundred".