23121200001 has 4 divisors (see below), whose sum is σ = 30828266672. Its totient is φ = 15414133332.

The previous prime is 23121199993. The next prime is 23121200027. The reversal of 23121200001 is 10000212132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 23121200001 - 2³ = 23121199993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23121200001.

It is not an unprimeable number, because it can be changed into a prime (23121202001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3853533331 + ... + 3853533336.

It is an arithmetic number, because the mean of its divisors is an integer number (7707066668).

Almost surely, 2^23121200001 is an apocalyptic number.

It is an amenable number.

23121200001 is a deficient number, since it is larger than the sum of its proper divisors (7707066671).

23121200001 is an equidigital number, since it uses as much as digits as its factorization.

23121200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7707066670.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 23121200001 its reverse (10000212132), we get a palindrome (33121412133).

The spelling of 23121200001 in words is "twenty-three billion, one hundred twenty-one million, two hundred thousand, one".