122391905120 has 96 divisors (see below), whose sum is σ = 293575091040. Its totient is φ = 48209817600.

The previous prime is 122391905113. The next prime is 122391905143. The reversal of 122391905120 is 21509193221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7689170 + ... + 7705070.

It is an arithmetic number, because the mean of its divisors is an integer number (3058073865).

Almost surely, 2^122391905120 is an apocalyptic number.

122391905120 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 122391905120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146787545520).

122391905120 is an abundant number, since it is smaller than the sum of its proper divisors (171183185920).

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

122391905120 is a wasteful number, since it uses less digits than its factorization.

122391905120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16648 (or 16640 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 35.

The spelling of 122391905120 in words is "one hundred twenty-two billion, three hundred ninety-one million, nine hundred five thousand, one hundred twenty".