23121021413 has 8 divisors (see below), whose sum is σ = 26426704320. Its totient is φ = 19816008480.

The previous prime is 23121021401. The next prime is 23121021437. The reversal of 23121021413 is 31412012132.

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 23121021413 - 2¹² = 23121017317 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 (23121021013) 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, 91223 + ... + 233588.

It is an arithmetic number, because the mean of its divisors is an integer number (3303338040).

Almost surely, 2^23121021413 is an apocalyptic number.

It is an amenable number.

23121021413 is a deficient number, since it is larger than the sum of its proper divisors (3305682907).

23121021413 is a wasteful number, since it uses less digits than its factorization.

23121021413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334987.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 23121021413 its reverse (31412012132), we get a palindrome (54533033545).

The spelling of 23121021413 in words is "twenty-three billion, one hundred twenty-one million, twenty-one thousand, four hundred thirteen".