23213121001 has 4 divisors (see below), whose sum is σ = 26529281152. Its totient is φ = 19896960852.

The previous prime is 23213120911. The next prime is 23213121077. The reversal of 23213121001 is 10012131232.

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 23213121001 - 2¹⁹ = 23212596713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23213121301) 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, 1658080065 + ... + 1658080078.

It is an arithmetic number, because the mean of its divisors is an integer number (6632320288).

Almost surely, 2^23213121001 is an apocalyptic number.

It is an amenable number.

23213121001 is a deficient number, since it is larger than the sum of its proper divisors (3316160151).

23213121001 is an equidigital number, since it uses as much as digits as its factorization.

23213121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3316160150.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 23213121001 its reverse (10012131232), we get a palindrome (33225252233).

The spelling of 23213121001 in words is "twenty-three billion, two hundred thirteen million, one hundred twenty-one thousand, one".