23130021321 has 18 divisors (see below), whose sum is σ = 36723424010. Its totient is φ = 14018194080.

The previous prime is 23130021293. The next prime is 23130021353. The reversal of 23130021321 is 12312003132.

23130021321 is a `hidden beast` number, since 23 + 1 + 300 + 21 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17493765696 + 5636255625 = 132264^2 + 75075^2 .

It is not a de Polignac number, because 23130021321 - 2³¹ = 20982537673 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23130021294 and 23130021303.

It is not an unprimeable number, because it can be changed into a prime (23130021391) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10618756 + ... + 10620933.

Almost surely, 2^23130021321 is an apocalyptic number.

It is an amenable number.

23130021321 is a deficient number, since it is larger than the sum of its proper divisors (13593402689).

23130021321 is a wasteful number, since it uses less digits than its factorization.

23130021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21239717 (or 21239703 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 23130021321 its reverse (12312003132), we get a palindrome (35442024453).

The spelling of 23130021321 in words is "twenty-three billion, one hundred thirty million, twenty-one thousand, three hundred twenty-one".