122912120 has 32 divisors (see below), whose sum is σ = 276937920. Its totient is φ = 49096320.

The previous prime is 122912107. The next prime is 122912123. The reversal of 122912120 is 21219221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 122912092 and 122912101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122912123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34754 + ... + 38126.

It is an arithmetic number, because the mean of its divisors is an integer number (8654310).

Almost surely, 2^122912120 is an apocalyptic number.

122912120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122912120 is an abundant number, since it is smaller than the sum of its proper divisors (154025800).

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

122912120 is a wasteful number, since it uses less digits than its factorization.

122912120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4295 (or 4291 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 122912120 is about 11086.5738621091. The cubic root of 122912120 is about 497.2005150209.

The spelling of 122912120 in words is "one hundred twenty-two million, nine hundred twelve thousand, one hundred twenty".