21316426132401 has 40 divisors (see below), whose sum is σ = 33973552967904. Its totient is φ = 13272913031040.

The previous prime is 21316426132357. The next prime is 21316426132429. The reversal of 21316426132401 is 10423162461312.

21316426132401 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 642 + 6 + 1 + 3 + 2 + 4 + 0 + 1 = 666.

It is not a de Polignac number, because 21316426132401 - 2⁷ = 21316426132273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21316426132471) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 58904875 + ... + 59265648.

Almost surely, 2^{21316426132401} is an apocalyptic number.

It is an amenable number.

21316426132401 is a deficient number, since it is larger than the sum of its proper divisors (12657126835503).

21316426132401 is a wasteful number, since it uses less digits than its factorization.

21316426132401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118170683 (or 118170674 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

Adding to 21316426132401 its reverse (10423162461312), we get a palindrome (31739588593713).

The spelling of 21316426132401 in words is "twenty-one trillion, three hundred sixteen billion, four hundred twenty-six million, one hundred thirty-two thousand, four hundred one".