21329612386401 has 32 divisors (see below), whose sum is σ = 32850723225600. Its totient is φ = 12166313114880.

The previous prime is 21329612386387. The next prime is 21329612386471. The reversal of 21329612386401 is 10468321692312.

It is not a de Polignac number, because 21329612386401 - 2²⁷ = 21329478168673 is a prime.

It is a super-2 number, since 2×21329612386401² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21329612386471) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22468080 + ... + 23398158.

It is an arithmetic number, because the mean of its divisors is an integer number (1026585100800).

Almost surely, 2^{21329612386401} is an apocalyptic number.

It is an amenable number.

21329612386401 is a deficient number, since it is larger than the sum of its proper divisors (11521110839199).

21329612386401 is a wasteful number, since it uses less digits than its factorization.

21329612386401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970989.

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 21329612386401 in words is "twenty-one trillion, three hundred twenty-nine billion, six hundred twelve million, three hundred eighty-six thousand, four hundred one".