2123113513 has 2 divisors, whose sum is σ = 2123113514. Its totient is φ = 2123113512.

The previous prime is 2123113511. The next prime is 2123113567. The reversal of 2123113513 is 3153113212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1632402409 + 490711104 = 40403^2 + 22152^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123113513 - 2¹ = 2123113511 is a prime.

It is a super-2 number, since 2×2123113513² = 9015221978166402338, which contains 22 as substring.

Together with 2123113511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2123113511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061556756 + 1061556757.

It is an arithmetic number, because the mean of its divisors is an integer number (1061556757).

Almost surely, 2^2123113513 is an apocalyptic number.

It is an amenable number.

2123113513 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123113513 is an equidigital number, since it uses as much as digits as its factorization.

2123113513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 22.

The square root of 2123113513 is about 46077.2559187285. The cubic root of 2123113513 is about 1285.2602364729.

Adding to 2123113513 its reverse (3153113212), we get a palindrome (5276226725).

The spelling of 2123113513 in words is "two billion, one hundred twenty-three million, one hundred thirteen thousand, five hundred thirteen".