12422512100 has 72 divisors (see below), whose sum is σ = 27781221888. Its totient is φ = 4818515200.

The previous prime is 12422512097. The next prime is 12422512103. The reversal of 12422512100 is 121522421.

It is an interprime number because it is at equal distance from previous prime (12422512097) and next prime (12422512103).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (12422512103) 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, 675629 + ... + 693771.

It is an arithmetic number, because the mean of its divisors is an integer number (385850304).

Almost surely, 2^12422512100 is an apocalyptic number.

12422512100 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 12422512100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13890610944).

12422512100 is an abundant number, since it is smaller than the sum of its proper divisors (15358709788).

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

12422512100 is a wasteful number, since it uses less digits than its factorization.

12422512100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18365 (or 18358 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The spelling of 12422512100 in words is "twelve billion, four hundred twenty-two million, five hundred twelve thousand, one hundred".