220695077621 has 2 divisors, whose sum is σ = 220695077622. Its totient is φ = 220695077620.

The previous prime is 220695077609. The next prime is 220695077623. The reversal of 220695077621 is 126770596022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173314848721 + 47380228900 = 416311^2 + 217670^2 .

It is a cyclic number.

It is not a de Polignac number, because 220695077621 - 2³⁴ = 203515208437 is a prime.

It is a super-2 number, since 2×220695077621² (a number of 23 digits) contains 22 as substring.

Together with 220695077623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220695077623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110347538810 + 110347538811.

It is an arithmetic number, because the mean of its divisors is an integer number (110347538811).

Almost surely, 2^220695077621 is an apocalyptic number.

It is an amenable number.

220695077621 is a deficient number, since it is larger than the sum of its proper divisors (1).

220695077621 is an equidigital number, since it uses as much as digits as its factorization.

220695077621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 220695077621 in words is "two hundred twenty billion, six hundred ninety-five million, seventy-seven thousand, six hundred twenty-one".