20031201232213 has 4 divisors (see below), whose sum is σ = 20132882456940. Its totient is φ = 19929520007488.

The previous prime is 20031201232177. The next prime is 20031201232249. The reversal of 20031201232213 is 31223210213002.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20031201232177) and next prime (20031201232249).

It can be written as a sum of positive squares in 2 ways, for example, as 13642732670449 + 6388468561764 = 3693607^2 + 2527542^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20031201232213 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 (20031201232283) 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, 50840612068 + ... + 50840612461.

It is an arithmetic number, because the mean of its divisors is an integer number (5033220614235).

Almost surely, 2^{20031201232213} is an apocalyptic number.

It is an amenable number.

20031201232213 is a deficient number, since it is larger than the sum of its proper divisors (101681224727).

20031201232213 is a wasteful number, since it uses less digits than its factorization.

20031201232213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101681224726.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20031201232213 its reverse (31223210213002), we get a palindrome (51254411445215).

The spelling of 20031201232213 in words is "twenty trillion, thirty-one billion, two hundred one million, two hundred thirty-two thousand, two hundred thirteen".