122621573256 has 128 divisors (see below), whose sum is σ = 377768966400. Its totient is φ = 32299315200.

The previous prime is 122621573183. The next prime is 122621573279. The reversal of 122621573256 is 652375126221.

122621573256 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1732156 + ... + 1801556.

It is an arithmetic number, because the mean of its divisors is an integer number (2951320050).

Almost surely, 2^122621573256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122621573256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188884483200).

122621573256 is an abundant number, since it is smaller than the sum of its proper divisors (255147393144).

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

122621573256 is a wasteful number, since it uses less digits than its factorization.

122621573256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70239 (or 70235 counting only the distinct ones).

The product of its digits is 302400, while the sum is 42.

Adding to 122621573256 its reverse (652375126221), we get a palindrome (774996699477).

The spelling of 122621573256 in words is "one hundred twenty-two billion, six hundred twenty-one million, five hundred seventy-three thousand, two hundred fifty-six".