122117156280 has 256 divisors, whose sum is σ = 466217856000. Its totient is φ = 27851917824.

The previous prime is 122117156257. The next prime is 122117156299. The reversal of 122117156280 is 82651711221.

It is a happy number.

122117156280 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 17 + 1 + 562 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3513226 + ... + 3547814.

It is an arithmetic number, because the mean of its divisors is an integer number (1821163500).

Almost surely, 2^122117156280 is an apocalyptic number.

122117156280 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 122117156280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233108928000).

122117156280 is an abundant number, since it is smaller than the sum of its proper divisors (344100699720).

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

122117156280 is a wasteful number, since it uses less digits than its factorization.

122117156280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35083 (or 35073 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The spelling of 122117156280 in words is "one hundred twenty-two billion, one hundred seventeen million, one hundred fifty-six thousand, two hundred eighty".