20123120113 has 4 divisors (see below), whose sum is σ = 20322359028. Its totient is φ = 19923881200.

The previous prime is 20123120063. The next prime is 20123120119. The reversal of 20123120113 is 31102132102.

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 14204587489 + 5918532624 = 119183^2 + 76932^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123120113 - 2²⁹ = 19586249201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123120119) 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, 99619306 + ... + 99619507.

It is an arithmetic number, because the mean of its divisors is an integer number (5080589757).

Almost surely, 2^20123120113 is an apocalyptic number.

It is an amenable number.

20123120113 is a deficient number, since it is larger than the sum of its proper divisors (199238915).

20123120113 is a wasteful number, since it uses less digits than its factorization.

20123120113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199238914.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20123120113 its reverse (31102132102), we get a palindrome (51225252215).

The spelling of 20123120113 in words is "twenty billion, one hundred twenty-three million, one hundred twenty thousand, one hundred thirteen".