122540261312 has 56 divisors (see below), whose sum is σ = 277983793536. Its totient is φ = 52502139648.

The previous prime is 122540261299. The next prime is 122540261377. The reversal of 122540261312 is 213162045221.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×122540261312² (a number of 23 digits) contains 22 as substring.

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, 1594523 + ... + 1669605.

Almost surely, 2^122540261312 is an apocalyptic number.

It is an amenable number.

122540261312 is an abundant number, since it is smaller than the sum of its proper divisors (155443532224).

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

122540261312 is an equidigital number, since it uses as much as digits as its factorization.

122540261312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78745 (or 78735 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 122540261312 in words is "one hundred twenty-two billion, five hundred forty million, two hundred sixty-one thousand, three hundred twelve".