121010210221081 has 2 divisors, whose sum is σ = 121010210221082. Its totient is φ = 121010210221080.

The previous prime is 121010210221049. The next prime is 121010210221123. The reversal of 121010210221081 is 180122012010121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91433373926400 + 29576836294681 = 9562080^2 + 5438459^2 .

It is a cyclic number.

It is not a de Polignac number, because 121010210221081 - 2⁵ = 121010210221049 is a prime.

It is a super-2 number, since 2×121010210221081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121010210291081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60505105110540 + 60505105110541.

It is an arithmetic number, because the mean of its divisors is an integer number (60505105110541).

Almost surely, 2^{121010210221081} is an apocalyptic number.

It is an amenable number.

121010210221081 is a deficient number, since it is larger than the sum of its proper divisors (1).

121010210221081 is an equidigital number, since it uses as much as digits as its factorization.

121010210221081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 22.

The spelling of 121010210221081 in words is "one hundred twenty-one trillion, ten billion, two hundred ten million, two hundred twenty-one thousand, eighty-one".