20312311231311 has 8 divisors (see below), whose sum is σ = 29545179972864. Its totient is φ = 12310491655320.

The previous prime is 20312311231291. The next prime is 20312311231349. The reversal of 20312311231311 is 11313211321302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20312311231311 - 2¹⁷ = 20312311100239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312311231361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307762291351 + ... + 307762291416.

It is an arithmetic number, because the mean of its divisors is an integer number (3693147496608).

Almost surely, 2^{20312311231311} is an apocalyptic number.

20312311231311 is a deficient number, since it is larger than the sum of its proper divisors (9232868741553).

20312311231311 is a wasteful number, since it uses less digits than its factorization.

20312311231311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615524582781.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 20312311231311 its reverse (11313211321302), we get a palindrome (31625522552613).

The spelling of 20312311231311 in words is "twenty trillion, three hundred twelve billion, three hundred eleven million, two hundred thirty-one thousand, three hundred eleven".