121339664 has 20 divisors (see below), whose sum is σ = 240830940. Its totient is φ = 59189760.

The previous prime is 121339649. The next prime is 121339703. The reversal of 121339664 is 466933121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40195600 + 81144064 = 6340^2 + 9008^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91829 + ... + 93140.

It is an arithmetic number, because the mean of its divisors is an integer number (12041547).

Almost surely, 2^121339664 is an apocalyptic number.

It is an amenable number.

121339664 is a deficient number, since it is larger than the sum of its proper divisors (119491276).

121339664 is a wasteful number, since it uses less digits than its factorization.

121339664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185018 (or 185012 counting only the distinct ones).

The product of its digits is 23328, while the sum is 35.

The square root of 121339664 is about 11015.4284528565. The cubic root of 121339664 is about 495.0711240181.

The spelling of 121339664 in words is "one hundred twenty-one million, three hundred thirty-nine thousand, six hundred sixty-four".