21769360201 has 2 divisors, whose sum is σ = 21769360202. Its totient is φ = 21769360200.

The previous prime is 21769360147. The next prime is 21769360211. The reversal of 21769360201 is 10206396712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14497364025 + 7271996176 = 120405^2 + 85276^2 .

It is a cyclic number.

It is not a de Polignac number, because 21769360201 - 2⁷ = 21769360073 is a prime.

It is not a weakly prime, because it can be changed into another prime (21769360211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10884680100 + 10884680101.

It is an arithmetic number, because the mean of its divisors is an integer number (10884680101).

Almost surely, 2^21769360201 is an apocalyptic number.

It is an amenable number.

21769360201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21769360201 is an equidigital number, since it uses as much as digits as its factorization.

21769360201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The spelling of 21769360201 in words is "twenty-one billion, seven hundred sixty-nine million, three hundred sixty thousand, two hundred one".