122991200 has 36 divisors (see below), whose sum is σ = 300254220. Its totient is φ = 49196160.

The previous prime is 122991191. The next prime is 122991221. The reversal of 122991200 is 2199221.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 122991200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76070 + ... + 77669.

It is an arithmetic number, because the mean of its divisors is an integer number (8340395).

Almost surely, 2^122991200 is an apocalyptic number.

122991200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122991200 is an abundant number, since it is smaller than the sum of its proper divisors (177263020).

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

122991200 is a wasteful number, since it uses less digits than its factorization.

122991200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153759 (or 153746 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 122991200 is about 11090.1397646738. The cubic root of 122991200 is about 497.3071228623.

It can be divided in two parts, 1229 and 91200, that added together give a palindrome (92429).

The spelling of 122991200 in words is "one hundred twenty-two million, nine hundred ninety-one thousand, two hundred".