121170586921 has 2 divisors, whose sum is σ = 121170586922. Its totient is φ = 121170586920.

The previous prime is 121170586919. The next prime is 121170586939. The reversal of 121170586921 is 129685071121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111612787225 + 9557799696 = 334085^2 + 97764^2 .

It is a cyclic number.

It is not a de Polignac number, because 121170586921 - 2¹ = 121170586919 is a prime.

It is a super-2 number, since 2×121170586921² (a number of 23 digits) contains 22 as substring.

Together with 121170586919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121170586951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60585293460 + 60585293461.

It is an arithmetic number, because the mean of its divisors is an integer number (60585293461).

Almost surely, 2^121170586921 is an apocalyptic number.

It is an amenable number.

121170586921 is a deficient number, since it is larger than the sum of its proper divisors (1).

121170586921 is an equidigital number, since it uses as much as digits as its factorization.

121170586921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 43.

The spelling of 121170586921 in words is "one hundred twenty-one billion, one hundred seventy million, five hundred eighty-six thousand, nine hundred twenty-one".