23121210013 has 8 divisors (see below), whose sum is σ = 25331394816. Its totient is φ = 20929068000.

The previous prime is 23121209989. The next prime is 23121210031. The reversal of 23121210013 is 31001212132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23121210013 - 2⁵ = 23121209981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121210913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4508013 + ... + 4513138.

It is an arithmetic number, because the mean of its divisors is an integer number (3166424352).

Almost surely, 2^23121210013 is an apocalyptic number.

It is an amenable number.

23121210013 is a deficient number, since it is larger than the sum of its proper divisors (2210184803).

23121210013 is a wasteful number, since it uses less digits than its factorization.

23121210013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9021395.

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

Adding to 23121210013 its reverse (31001212132), we get a palindrome (54122422145).

The spelling of 23121210013 in words is "twenty-three billion, one hundred twenty-one million, two hundred ten thousand, thirteen".