220120121020081 has 2 divisors, whose sum is σ = 220120121020082. Its totient is φ = 220120121020080.

The previous prime is 220120121020067. The next prime is 220120121020123. The reversal of 220120121020081 is 180020121021022.

220120121020081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184658203210000 + 35461917810081 = 13588900^2 + 5954991^2 .

It is a cyclic number.

It is not a de Polignac number, because 220120121020081 - 2⁹ = 220120121019569 is a prime.

It is a super-2 number, since 2×220120121020081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (220120121020061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060060510040 + 110060060510041.

It is an arithmetic number, because the mean of its divisors is an integer number (110060060510041).

Almost surely, 2^{220120121020081} is an apocalyptic number.

It is an amenable number.

220120121020081 is a deficient number, since it is larger than the sum of its proper divisors (1).

220120121020081 is an equidigital number, since it uses as much as digits as its factorization.

220120121020081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 22.

The spelling of 220120121020081 in words is "two hundred twenty trillion, one hundred twenty billion, one hundred twenty-one million, twenty thousand, eighty-one".