20211131230013 has 4 divisors (see below), whose sum is σ = 20419493407740. Its totient is φ = 20002769052288.

The previous prime is 20211131230007. The next prime is 20211131230063. The reversal of 20211131230013 is 31003213111202.

It is a happy number.

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 5509451117284 + 14701680112729 = 2347222^2 + 3834277^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211131230013 - 2²² = 20211127035709 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 (20211131230063) 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, 104181088718 + ... + 104181088911.

It is an arithmetic number, because the mean of its divisors is an integer number (5104873351935).

Almost surely, 2^{20211131230013} is an apocalyptic number.

It is an amenable number.

20211131230013 is a deficient number, since it is larger than the sum of its proper divisors (208362177727).

20211131230013 is an equidigital number, since it uses as much as digits as its factorization.

20211131230013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208362177726.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 20211131230013 its reverse (31003213111202), we get a palindrome (51214344341215).

The spelling of 20211131230013 in words is "twenty trillion, two hundred eleven billion, one hundred thirty-one million, two hundred thirty thousand, thirteen".