21714722981901 has 6 divisors (see below), whose sum is σ = 31365710973870. Its totient is φ = 14476481987928.

The previous prime is 21714722981857. The next prime is 21714722981909. The reversal of 21714722981901 is 10918922741712.

It is a happy number.

21714722981901 is a `hidden beast` number, since 2 + 1 + 7 + 1 + 472 + 2 + 9 + 81 + 90 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21242927090025 + 471795891876 = 4609005^2 + 686874^2 .

It is not a de Polignac number, because 21714722981901 - 2⁶ = 21714722981837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21714722981909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1206373498986 + ... + 1206373499003.

It is an arithmetic number, because the mean of its divisors is an integer number (5227618495645).

Almost surely, 2^{21714722981901} is an apocalyptic number.

It is an amenable number.

21714722981901 is a deficient number, since it is larger than the sum of its proper divisors (9650987991969).

21714722981901 is a wasteful number, since it uses less digits than its factorization.

21714722981901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412746997995 (or 2412746997992 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

The spelling of 21714722981901 in words is "twenty-one trillion, seven hundred fourteen billion, seven hundred twenty-two million, nine hundred eighty-one thousand, nine hundred one".