64120121 has 12 divisors (see below), whose sum is σ = 71677440. Its totient is φ = 57273840.

The previous prime is 64120099. The next prime is 64120129. The reversal of 64120121 is 12102146.

It is a de Polignac number, because none of the positive numbers 2^k-64120121 is a prime.

It is a super-2 number, since 2×64120121² = 8222779834109282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64120121.

It is not an unprimeable number, because it can be changed into a prime (64120129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 881 + ... + 11358.

It is an arithmetic number, because the mean of its divisors is an integer number (5973120).

Almost surely, 2^64120121 is an apocalyptic number.

It is an amenable number.

64120121 is a deficient number, since it is larger than the sum of its proper divisors (7557319).

64120121 is a wasteful number, since it uses less digits than its factorization.

64120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12296 (or 12283 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 64120121 is about 8007.5040430836. The cubic root of 64120121 is about 400.2500956811.

Adding to 64120121 its reverse (12102146), we get a palindrome (76222267).

The spelling of 64120121 in words is "sixty-four million, one hundred twenty thousand, one hundred twenty-one".