21230200232113 has 4 divisors (see below), whose sum is σ = 21230217356788. Its totient is φ = 21230183107440.

The previous prime is 21230200232083. The next prime is 21230200232173. The reversal of 21230200232113 is 31123200203212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11813298954304 + 9416901277809 = 3437048^2 + 3068697^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230200232113 - 2⁴¹ = 19031176976561 is a prime.

It is a super-2 number, since 2×21230200232113² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21230200232173) 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, 6544158 + ... + 9235063.

It is an arithmetic number, because the mean of its divisors is an integer number (5307554339197).

Almost surely, 2^{21230200232113} is an apocalyptic number.

It is an amenable number.

21230200232113 is a deficient number, since it is larger than the sum of its proper divisors (17124675).

21230200232113 is a wasteful number, since it uses less digits than its factorization.

21230200232113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17124674.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21230200232113 its reverse (31123200203212), we get a palindrome (52353400435325).

The spelling of 21230200232113 in words is "twenty-one trillion, two hundred thirty billion, two hundred million, two hundred thirty-two thousand, one hundred thirteen".