220001232201931 has 2 divisors, whose sum is σ = 220001232201932. Its totient is φ = 220001232201930.

The previous prime is 220001232201929. The next prime is 220001232201977. The reversal of 220001232201931 is 139102232100022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220001232201931 - 2¹ = 220001232201929 is a prime.

It is a super-2 number, since 2×220001232201931² (a number of 29 digits) contains 22 as substring.

Together with 220001232201929, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 220001232201931.

It is not a weakly prime, because it can be changed into another prime (220001232201431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110000616100965 + 110000616100966.

It is an arithmetic number, because the mean of its divisors is an integer number (110000616100966).

Almost surely, 2^{220001232201931} is an apocalyptic number.

220001232201931 is a deficient number, since it is larger than the sum of its proper divisors (1).

220001232201931 is an equidigital number, since it uses as much as digits as its factorization.

220001232201931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

Adding to 220001232201931 its reverse (139102232100022), we get a palindrome (359103464301953).

The spelling of 220001232201931 in words is "two hundred twenty trillion, one billion, two hundred thirty-two million, two hundred one thousand, nine hundred thirty-one".