122551162500 has 144 divisors (see below), whose sum is σ = 384913238976. Its totient is φ = 30166320000.

The previous prime is 122551162457. The next prime is 122551162507. The reversal of 122551162500 is 5261155221.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (122551162507) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 361807 + ... + 613193.

It is an arithmetic number, because the mean of its divisors is an integer number (2673008604).

Almost surely, 2^122551162500 is an apocalyptic number.

122551162500 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 122551162500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192456619488).

122551162500 is an abundant number, since it is smaller than the sum of its proper divisors (262362076476).

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

122551162500 is a wasteful number, since it uses less digits than its factorization.

122551162500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251432 (or 251410 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The spelling of 122551162500 in words is "one hundred twenty-two billion, five hundred fifty-one million, one hundred sixty-two thousand, five hundred".