122551100 has 72 divisors (see below), whose sum is σ = 314459040. Its totient is φ = 40561920.

The previous prime is 122551087. The next prime is 122551109. The reversal of 122551100 is 1155221.

It is a super-2 number, since 2×122551100² = 30037544222420000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122551109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17282 + ... + 23318.

Almost surely, 2^122551100 is an apocalyptic number.

122551100 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 122551100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157229520).

122551100 is an abundant number, since it is smaller than the sum of its proper divisors (191907940).

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

122551100 is a wasteful number, since it uses less digits than its factorization.

122551100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6087 (or 6080 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 122551100 is about 11070.2800325918. The cubic root of 122551100 is about 496.7132417823.

It can be divided in two parts, 1225 and 51100, that added together give a palindrome (52325).

The spelling of 122551100 in words is "one hundred twenty-two million, five hundred fifty-one thousand, one hundred".