121499664 has 160 divisors (see below), whose sum is σ = 381308928. Its totient is φ = 32832000.

The previous prime is 121499659. The next prime is 121499669. The reversal of 121499664 is 466994121.

It is an interprime number because it is at equal distance from previous prime (121499659) and next prime (121499669).

It is a super-2 number, since 2×121499664² = 29524336704225792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121499669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212499 + ... + 213069.

Almost surely, 2^121499664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121499664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190654464).

121499664 is an abundant number, since it is smaller than the sum of its proper divisors (259809264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121499664 is a wasteful number, since it uses less digits than its factorization.

121499664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 631 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 121499664 is about 11022.6886012443. The cubic root of 121499664 is about 495.2886307710.

The spelling of 121499664 in words is "one hundred twenty-one million, four hundred ninety-nine thousand, six hundred sixty-four".