21176942701 has 2 divisors, whose sum is σ = 21176942702. Its totient is φ = 21176942700.

The previous prime is 21176942693. The next prime is 21176942719. The reversal of 21176942701 is 10724967112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16965062500 + 4211880201 = 130250^2 + 64899^2 .

It is a cyclic number.

It is not a de Polignac number, because 21176942701 - 2³ = 21176942693 is a prime.

It is a super-2 number, since 2×21176942701² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21176942741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10588471350 + 10588471351.

It is an arithmetic number, because the mean of its divisors is an integer number (10588471351).

Almost surely, 2^21176942701 is an apocalyptic number.

It is an amenable number.

21176942701 is a deficient number, since it is larger than the sum of its proper divisors (1).

21176942701 is an equidigital number, since it uses as much as digits as its factorization.

21176942701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 40.

The spelling of 21176942701 in words is "twenty-one billion, one hundred seventy-six million, nine hundred forty-two thousand, seven hundred one".