23120212013 has 4 divisors (see below), whose sum is σ = 23137715388. Its totient is φ = 23102708640.

The previous prime is 23120211971. The next prime is 23120212043. The reversal of 23120212013 is 31021202132.

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 10754104804 + 12366107209 = 103702^2 + 111203^2 .

It is a cyclic number.

It is not a de Polignac number, because 23120212013 - 2⁶ = 23120211949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23120211982 and 23120212000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23120212043) 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, 8749706 + ... + 8752347.

It is an arithmetic number, because the mean of its divisors is an integer number (5784428847).

Almost surely, 2^23120212013 is an apocalyptic number.

It is an amenable number.

23120212013 is a deficient number, since it is larger than the sum of its proper divisors (17503375).

23120212013 is a wasteful number, since it uses less digits than its factorization.

23120212013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17503374.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 23120212013 its reverse (31021202132), we get a palindrome (54141414145).

The spelling of 23120212013 in words is "twenty-three billion, one hundred twenty million, two hundred twelve thousand, thirteen".