220231103021081 has 2 divisors, whose sum is σ = 220231103021082. Its totient is φ = 220231103021080.

The previous prime is 220231103021003. The next prime is 220231103021087. The reversal of 220231103021081 is 180120301132022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178135869030025 + 42095233991056 = 13346755^2 + 6488084^2 .

It is a cyclic number.

It is not a de Polignac number, because 220231103021081 - 2¹⁰ = 220231103020057 is a prime.

It is a super-2 number, since 2×220231103021081² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 220231103021081.

It is not a weakly prime, because it can be changed into another prime (220231103021087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110115551510540 + 110115551510541.

It is an arithmetic number, because the mean of its divisors is an integer number (110115551510541).

Almost surely, 2^{220231103021081} is an apocalyptic number.

It is an amenable number.

220231103021081 is a deficient number, since it is larger than the sum of its proper divisors (1).

220231103021081 is an equidigital number, since it uses as much as digits as its factorization.

220231103021081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 220231103021081 in words is "two hundred twenty trillion, two hundred thirty-one billion, one hundred three million, twenty-one thousand, eighty-one".