23121000001 has 4 divisors (see below), whose sum is σ = 25222909104. Its totient is φ = 21019090900.

The previous prime is 23120999959. The next prime is 23121000011. The reversal of 23121000001 is 10000012132.

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 a cyclic number.

It is not a de Polignac number, because 23121000001 - 2³¹ = 20973516353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23121000011) 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, 1050954535 + ... + 1050954556.

It is an arithmetic number, because the mean of its divisors is an integer number (6305727276).

Almost surely, 2^23121000001 is an apocalyptic number.

It is an amenable number.

23121000001 is a deficient number, since it is larger than the sum of its proper divisors (2101909103).

23121000001 is a wasteful number, since it uses less digits than its factorization.

23121000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101909102.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 23121000001 its reverse (10000012132), we get a palindrome (33121012133).

The spelling of 23121000001 in words is "twenty-three billion, one hundred twenty-one million, one", and thus it is an aban number.