122130405520 has 40 divisors (see below), whose sum is σ = 298898101440. Its totient is φ = 46280995200.

The previous prime is 122130405511. The next prime is 122130405521. The reversal of 122130405520 is 25504031221.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (122130405521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40172956 + ... + 40175995.

It is an arithmetic number, because the mean of its divisors is an integer number (7472452536).

Almost surely, 2^122130405520 is an apocalyptic number.

122130405520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122130405520 is an abundant number, since it is smaller than the sum of its proper divisors (176767695920).

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

122130405520 is a wasteful number, since it uses less digits than its factorization.

122130405520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80348983 (or 80348977 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 122130405520 its reverse (25504031221), we get a palindrome (147634436741).

The spelling of 122130405520 in words is "one hundred twenty-two billion, one hundred thirty million, four hundred five thousand, five hundred twenty".