20112331213 has 6 divisors (see below), whose sum is σ = 21778441674. Its totient is φ = 18565228656.

The previous prime is 20112331201. The next prime is 20112331243. The reversal of 20112331213 is 31213321102.

It can be written as a sum of positive squares in 3 ways, for example, as 1069159204 + 19043172009 = 32698^2 + 137997^2 .

It is not a de Polignac number, because 20112331213 - 2⁵ = 20112331181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112331243) 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 5 ways as a sum of consecutive naturals, for example, 59503770 + ... + 59504107.

It is an arithmetic number, because the mean of its divisors is an integer number (3629740279).

Almost surely, 2^20112331213 is an apocalyptic number.

It is an amenable number.

20112331213 is a deficient number, since it is larger than the sum of its proper divisors (1666110461).

20112331213 is a wasteful number, since it uses less digits than its factorization.

20112331213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119007903 (or 119007890 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20112331213 its reverse (31213321102), we get a palindrome (51325652315).

The spelling of 20112331213 in words is "twenty billion, one hundred twelve million, three hundred thirty-one thousand, two hundred thirteen".