20131130123 has 16 divisors (see below), whose sum is σ = 21843419136. Its totient is φ = 18442766880.

The previous prime is 20131130101. The next prime is 20131130137. The reversal of 20131130123 is 32103113102.

It is a cyclic number.

It is not a de Polignac number, because 20131130123 - 2²⁶ = 20064021259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20131130153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 915686 + ... + 937412.

It is an arithmetic number, because the mean of its divisors is an integer number (1365213696).

Almost surely, 2^20131130123 is an apocalyptic number.

20131130123 is a deficient number, since it is larger than the sum of its proper divisors (1712289013).

20131130123 is a wasteful number, since it uses less digits than its factorization.

20131130123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22274.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20131130123 its reverse (32103113102), we get a palindrome (52234243225).

The spelling of 20131130123 in words is "twenty billion, one hundred thirty-one million, one hundred thirty thousand, one hundred twenty-three".