20031212113 has 16 divisors (see below), whose sum is σ = 22144665600. Its totient is φ = 17966828880.

The previous prime is 20031212093. The next prime is 20031212143. The reversal of 20031212113 is 31121213002.

It is a de Polignac number, because none of the positive numbers 2^k-20031212113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20031212143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1333398 + ... + 1348336.

It is an arithmetic number, because the mean of its divisors is an integer number (1384041600).

Almost surely, 2^20031212113 is an apocalyptic number.

It is an amenable number.

20031212113 is a deficient number, since it is larger than the sum of its proper divisors (2113453487).

20031212113 is a wasteful number, since it uses less digits than its factorization.

20031212113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16572.

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

Adding to 20031212113 its reverse (31121213002), we get a palindrome (51152425115).

The spelling of 20031212113 in words is "twenty billion, thirty-one million, two hundred twelve thousand, one hundred thirteen".