23451221100 has 144 divisors (see below), whose sum is σ = 69176683520. Its totient is φ = 6132672000.

The previous prime is 23451221099. The next prime is 23451221161. The reversal of 23451221100 is 112215432.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3575424 + ... + 3581976.

Almost surely, 2^23451221100 is an apocalyptic number.

23451221100 is a gapful number since it is divisible by the number (20) 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 23451221100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34588341760).

23451221100 is an abundant number, since it is smaller than the sum of its proper divisors (45725462420).

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

23451221100 is a wasteful number, since it uses less digits than its factorization.

23451221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6800 (or 6793 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 23451221100 its reverse (112215432), we get a palindrome (23563436532).

The spelling of 23451221100 in words is "twenty-three billion, four hundred fifty-one million, two hundred twenty-one thousand, one hundred".