120121010849857 has 2 divisors, whose sum is σ = 120121010849858. Its totient is φ = 120121010849856.

The previous prime is 120121010849831. The next prime is 120121010849897. The reversal of 120121010849857 is 758948010121021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93898735698496 + 26222275151361 = 9690136^2 + 5120769^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120121010849857 is a prime.

It is a super-2 number, since 2×120121010849857² (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 120121010849857.

It is not a weakly prime, because it can be changed into another prime (120121010849897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60060505424928 + 60060505424929.

It is an arithmetic number, because the mean of its divisors is an integer number (60060505424929).

Almost surely, 2^{120121010849857} is an apocalyptic number.

It is an amenable number.

120121010849857 is a deficient number, since it is larger than the sum of its proper divisors (1).

120121010849857 is an equidigital number, since it uses as much as digits as its factorization.

120121010849857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 49.

The spelling of 120121010849857 in words is "one hundred twenty trillion, one hundred twenty-one billion, ten million, eight hundred forty-nine thousand, eight hundred fifty-seven".