31311323111 has 8 divisors (see below), whose sum is σ = 32508200064. Its totient is φ = 30126123360.

The previous prime is 31311323101. The next prime is 31311323137. The reversal of 31311323111 is 11132311313.

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

It is a cyclic number.

It is not a de Polignac number, because 31311323111 - 2⁶ = 31311323047 is a prime.

It is a super-2 number, since 2×31311323111² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311323101) 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, 2913836 + ... + 2924561.

It is an arithmetic number, because the mean of its divisors is an integer number (4063525008).

Almost surely, 2^31311323111 is an apocalyptic number.

31311323111 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31311323111 is a deficient number, since it is larger than the sum of its proper divisors (1196876953).

31311323111 is a wasteful number, since it uses less digits than its factorization.

31311323111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5838601.

The product of its digits is 162, while the sum is 20.

Adding to 31311323111 its reverse (11132311313), we get a palindrome (42443634424).

The spelling of 31311323111 in words is "thirty-one billion, three hundred eleven million, three hundred twenty-three thousand, one hundred eleven".