122012520 has 64 divisors (see below), whose sum is σ = 418331520. Its totient is φ = 27888384.

The previous prime is 122012507. The next prime is 122012533. The reversal of 122012520 is 25210221.

It is an interprime number because it is at equal distance from previous prime (122012507) and next prime (122012533).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 122012520.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 71787 + ... + 73466.

It is an arithmetic number, because the mean of its divisors is an integer number (6536430).

Almost surely, 2^122012520 is an apocalyptic number.

122012520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122012520 is an abundant number, since it is smaller than the sum of its proper divisors (296319000).

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

122012520 is a wasteful number, since it uses less digits than its factorization.

122012520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145274 (or 145270 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 122012520 is about 11045.9277564177. The cubic root of 122012520 is about 495.9845316890.

Adding to 122012520 its reverse (25210221), we get a palindrome (147222741).

The spelling of 122012520 in words is "one hundred twenty-two million, twelve thousand, five hundred twenty".