121164521 has 2 divisors, whose sum is σ = 121164522. Its totient is φ = 121164520.

The previous prime is 121164499. The next prime is 121164557. The reversal of 121164521 is 125461121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113656921 + 7507600 = 10661^2 + 2740^2 .

It is an emirp because it is prime and its reverse (125461121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121164521 - 2²⁶ = 54055657 is a prime.

It is a super-2 number, since 2×121164521² = 29361682298318882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121064521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60582260 + 60582261.

It is an arithmetic number, because the mean of its divisors is an integer number (60582261).

Almost surely, 2^121164521 is an apocalyptic number.

It is an amenable number.

121164521 is a deficient number, since it is larger than the sum of its proper divisors (1).

121164521 is an equidigital number, since it uses as much as digits as its factorization.

121164521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 23.

The square root of 121164521 is about 11007.4756870047. The cubic root of 121164521 is about 494.8328122931.

The spelling of 121164521 in words is "one hundred twenty-one million, one hundred sixty-four thousand, five hundred twenty-one".