23121000200 has 96 divisors (see below), whose sum is σ = 54340450560. Its totient is φ = 9148473600.

The previous prime is 23121000179. The next prime is 23121000239. The reversal of 23121000200 is 200012132.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7299017 + ... + 7302183.

It is an arithmetic number, because the mean of its divisors is an integer number (566046360).

Almost surely, 2^23121000200 is an apocalyptic number.

23121000200 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 23121000200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27170225280).

23121000200 is an abundant number, since it is smaller than the sum of its proper divisors (31219450360).

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

23121000200 is a wasteful number, since it uses less digits than its factorization.

23121000200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3567 (or 3558 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 23121000200 its reverse (200012132), we get a palindrome (23321012332).

The spelling of 23121000200 in words is "twenty-three billion, one hundred twenty-one million, two hundred", and thus it is an aban number.