122120621560 has 64 divisors (see below), whose sum is σ = 317261891520. Its totient is φ = 41438269440.

The previous prime is 122120621549. The next prime is 122120621561. The reversal of 122120621560 is 65126021221.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122120621561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2221011 + ... + 2275330.

It is an arithmetic number, because the mean of its divisors is an integer number (4957217055).

Almost surely, 2^122120621560 is an apocalyptic number.

122120621560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122120621560 is an abundant number, since it is smaller than the sum of its proper divisors (195141269960).

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

122120621560 is a wasteful number, since it uses less digits than its factorization.

122120621560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4496456 (or 4496452 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 122120621560 its reverse (65126021221), we get a palindrome (187246642781).

The spelling of 122120621560 in words is "one hundred twenty-two billion, one hundred twenty million, six hundred twenty-one thousand, five hundred sixty".