20113231037213 has 2 divisors, whose sum is σ = 20113231037214. Its totient is φ = 20113231037212.

The previous prime is 20113231037131. The next prime is 20113231037239. The reversal of 20113231037213 is 31273013231102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15864265102009 + 4248965935204 = 3982997^2 + 2061302^2 .

It is a cyclic number.

It is not a de Polignac number, because 20113231037213 - 2²⁶ = 20113163928349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20113221037213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056615518606 + 10056615518607.

It is an arithmetic number, because the mean of its divisors is an integer number (10056615518607).

Almost surely, 2^{20113231037213} is an apocalyptic number.

It is an amenable number.

20113231037213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113231037213 is an equidigital number, since it uses as much as digits as its factorization.

20113231037213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

Adding to 20113231037213 its reverse (31273013231102), we get a palindrome (51386244268315).

The spelling of 20113231037213 in words is "twenty trillion, one hundred thirteen billion, two hundred thirty-one million, thirty-seven thousand, two hundred thirteen".