122131840 has 64 divisors (see below), whose sum is σ = 304702560. Its totient is φ = 46723072.

The previous prime is 122131837. The next prime is 122131853. The reversal of 122131840 is 48131221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10572 + ... + 18868.

Almost surely, 2^122131840 is an apocalyptic number.

122131840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122131840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152351280).

122131840 is an abundant number, since it is smaller than the sum of its proper divisors (182570720).

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

122131840 is an equidigital number, since it uses as much as digits as its factorization.

122131840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8339 (or 8327 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 122131840 is about 11051.3275220672. The cubic root of 122131840 is about 496.1461587995.

The spelling of 122131840 in words is "one hundred twenty-two million, one hundred thirty-one thousand, eight hundred forty".