122331396978 has 54 divisors (see below), whose sum is σ = 308351234061. Its totient is φ = 34948859904.

The previous prime is 122331396973. The next prime is 122331396991. The reversal of 122331396978 is 879693133221.

122331396978 is a `hidden beast` number, since 12 + 233 + 1 + 396 + 9 + 7 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 117212423769 + 5118973209 = 342363^2 + 71547^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=247317.

It is not an unprimeable number, because it can be changed into a prime (122331396973) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 10381426 + ... + 10393202.

Almost surely, 2^122331396978 is an apocalyptic number.

122331396978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

122331396978 is an abundant number, since it is smaller than the sum of its proper divisors (186019837083).

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

122331396978 is an frugal number, since it uses more digits than its factorization.

122331396978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23576 (or 11789 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The spelling of 122331396978 in words is "one hundred twenty-two billion, three hundred thirty-one million, three hundred ninety-six thousand, nine hundred seventy-eight".