122215649688 has 128 divisors (see below), whose sum is σ = 392135904000. Its totient is φ = 34856501760.

The previous prime is 122215649669. The next prime is 122215649713. The reversal of 122215649688 is 886946512221.

122215649688 is a `hidden beast` number, since 1 + 2 + 2 + 21 + 56 + 496 + 88 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1472478 + ... + 1553261.

It is an arithmetic number, because the mean of its divisors is an integer number (3063561750).

Almost surely, 2^122215649688 is an apocalyptic number.

122215649688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

122215649688 is an abundant number, since it is smaller than the sum of its proper divisors (269920254312).

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

122215649688 is a wasteful number, since it uses less digits than its factorization.

122215649688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3025782 (or 3025772 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

It can be divided in two parts, 122215 and 649688, that added together give a triangular number (771903 = T₁₂₄₂).

The spelling of 122215649688 in words is "one hundred twenty-two billion, two hundred fifteen million, six hundred forty-nine thousand, six hundred eighty-eight".