122971988240 has 80 divisors (see below), whose sum is σ = 293726575296. Its totient is φ = 47853120000.

The previous prime is 122971988221. The next prime is 122971988263. The reversal of 122971988240 is 42889179221.

It is a tau number, because it is divible by the number of its divisors (80).

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, 792230 + ... + 934650.

Almost surely, 2^122971988240 is an apocalyptic number.

122971988240 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 122971988240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146863287648).

122971988240 is an abundant number, since it is smaller than the sum of its proper divisors (170754587056).

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

122971988240 is a wasteful number, since it uses less digits than its factorization.

122971988240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142728 (or 142722 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 53.

The spelling of 122971988240 in words is "one hundred twenty-two billion, nine hundred seventy-one million, nine hundred eighty-eight thousand, two hundred forty".