123622521220 has 24 divisors (see below), whose sum is σ = 283207958208. Its totient is φ = 44953644000.

The previous prime is 123622521203. The next prime is 123622521229. The reversal of 123622521220 is 22125226321.

It is not an unprimeable number, because it can be changed into a prime (123622521229) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 280960056 + ... + 280960495.

It is an arithmetic number, because the mean of its divisors is an integer number (11800331592).

Almost surely, 2^123622521220 is an apocalyptic number.

123622521220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123622521220 is an abundant number, since it is smaller than the sum of its proper divisors (159585436988).

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

123622521220 is a wasteful number, since it uses less digits than its factorization.

123622521220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561920571 (or 561920569 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 123622521220 its reverse (22125226321), we get a palindrome (145747747541).

The spelling of 123622521220 in words is "one hundred twenty-three billion, six hundred twenty-two million, five hundred twenty-one thousand, two hundred twenty".