31311243111 has 8 divisors (see below), whose sum is σ = 42117778800. Its totient is φ = 20689434752.

The previous prime is 31311243107. The next prime is 31311243143. The reversal of 31311243111 is 11134211313.

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 31311243111 - 2² = 31311243107 is a prime.

It is a super-2 number, since 2×31311243111² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311243811) 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, 46181436 + ... + 46182113.

It is an arithmetic number, because the mean of its divisors is an integer number (5264722350).

Almost surely, 2^31311243111 is an apocalyptic number.

31311243111 is a deficient number, since it is larger than the sum of its proper divisors (10806535689).

31311243111 is a wasteful number, since it uses less digits than its factorization.

31311243111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92363665.

The product of its digits is 216, while the sum is 21.

Adding to 31311243111 its reverse (11134211313), we get a palindrome (42445454424).

The spelling of 31311243111 in words is "thirty-one billion, three hundred eleven million, two hundred forty-three thousand, one hundred eleven".