23130200021 has 2 divisors, whose sum is σ = 23130200022. Its totient is φ = 23130200020.

The previous prime is 23130199991. The next prime is 23130200029. The reversal of 23130200021 is 12000203132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23046276100 + 83923921 = 151810^2 + 9161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23130200021 is a prime.

It is a super-2 number, since 2×23130200021² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23130199969 and 23130200005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23130200029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565100010 + 11565100011.

It is an arithmetic number, because the mean of its divisors is an integer number (11565100011).

Almost surely, 2^23130200021 is an apocalyptic number.

It is an amenable number.

23130200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23130200021 is an equidigital number, since it uses as much as digits as its factorization.

23130200021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 23130200021 its reverse (12000203132), we get a palindrome (35130403153).

The spelling of 23130200021 in words is "twenty-three billion, one hundred thirty million, two hundred thousand, twenty-one".