31341021311 has 4 divisors (see below), whose sum is σ = 31342252872. Its totient is φ = 31339789752.

The previous prime is 31341021301. The next prime is 31341021319. The reversal of 31341021311 is 11312014313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11312014313 = 65719 ⋅172127.

It is a cyclic number.

It is not a de Polignac number, because 31341021311 - 2¹⁸ = 31340759167 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 (31341021319) 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, 576785 + ... + 628778.

It is an arithmetic number, because the mean of its divisors is an integer number (7835563218).

Almost surely, 2^31341021311 is an apocalyptic number.

31341021311 is a deficient number, since it is larger than the sum of its proper divisors (1231561).

31341021311 is a wasteful number, since it uses less digits than its factorization.

31341021311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231560.

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

Adding to 31341021311 its reverse (11312014313), we get a palindrome (42653035624).

The spelling of 31341021311 in words is "thirty-one billion, three hundred forty-one million, twenty-one thousand, three hundred eleven".