21130323231113 has 4 divisors (see below), whose sum is σ = 21131440133760. Its totient is φ = 21129206328468.

The previous prime is 21130323231107. The next prime is 21130323231133. The reversal of 21130323231113 is 31113232303112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21130323231113 - 2⁴ = 21130323231097 is a prime.

It is a super-2 number, since 2×21130323231113² (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 (21130323231103) 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, 558422945 + ... + 558460782.

It is an arithmetic number, because the mean of its divisors is an integer number (5282860033440).

Almost surely, 2^{21130323231113} is an apocalyptic number.

It is an amenable number.

21130323231113 is a deficient number, since it is larger than the sum of its proper divisors (1116902647).

21130323231113 is a wasteful number, since it uses less digits than its factorization.

21130323231113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116902646.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 21130323231113 its reverse (31113232303112), we get a palindrome (52243555534225).

The spelling of 21130323231113 in words is "twenty-one trillion, one hundred thirty billion, three hundred twenty-three million, two hundred thirty-one thousand, one hundred thirteen".