21751421467131 has 12 divisors (see below), whose sum is σ = 31419875477952. Its totient is φ = 14500414299696.

The previous prime is 21751421467121. The next prime is 21751421467147. The reversal of 21751421467131 is 13176412415712.

21751421467131 is a `hidden beast` number, since 2 + 1 + 7 + 51 + 4 + 2 + 1 + 467 + 131 = 666.

It is not a de Polignac number, because 21751421467131 - 2⁷ = 21751421467003 is a prime.

It is a super-2 number, since 2×21751421467131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21751421467121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44187051 + ... + 44676596.

It is an arithmetic number, because the mean of its divisors is an integer number (2618322956496).

Almost surely, 2^{21751421467131} is an apocalyptic number.

21751421467131 is a deficient number, since it is larger than the sum of its proper divisors (9668454010821).

21751421467131 is a wasteful number, since it uses less digits than its factorization.

21751421467131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88890850 (or 88890847 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The spelling of 21751421467131 in words is "twenty-one trillion, seven hundred fifty-one billion, four hundred twenty-one million, four hundred sixty-seven thousand, one hundred thirty-one".