21454443310131 has 72 divisors (see below), whose sum is σ = 35850318803520. Its totient is φ = 12321168095808.

The previous prime is 21454443310123. The next prime is 21454443310159. The reversal of 21454443310131 is 13101334445412.

21454443310131 is a `hidden beast` number, since 2 + 1 + 4 + 54 + 443 + 31 + 0 + 131 = 666.

It is not a de Polignac number, because 21454443310131 - 2³ = 21454443310123 is a prime.

It is a super-2 number, since 2×21454443310131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21454443310031) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3604021 + ... + 7476486.

Almost surely, 2^{21454443310131} is an apocalyptic number.

21454443310131 is a deficient number, since it is larger than the sum of its proper divisors (14395875493389).

21454443310131 is a wasteful number, since it uses less digits than its factorization.

21454443310131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11080625 (or 11080609 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 21454443310131 its reverse (13101334445412), we get a palindrome (34555777755543).

The spelling of 21454443310131 in words is "twenty-one trillion, four hundred fifty-four billion, four hundred forty-three million, three hundred ten thousand, one hundred thirty-one".