31311241111 has 8 divisors (see below), whose sum is σ = 31440263904. Its totient is φ = 31182274560.

The previous prime is 31311241069. The next prime is 31311241123. The reversal of 31311241111 is 11114211313.

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 31311241111 - 2⁹ = 31311240599 is a prime.

It is a super-2 number, since 2×31311241111² (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 (31311241151) 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, 1384551 + ... + 1406983.

It is an arithmetic number, because the mean of its divisors is an integer number (3930032988).

Almost surely, 2^31311241111 is an apocalyptic number.

31311241111 is a deficient number, since it is larger than the sum of its proper divisors (129022793).

31311241111 is a wasteful number, since it uses less digits than its factorization.

31311241111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28121.

The product of its digits is 72, while the sum is 19.

Adding to 31311241111 its reverse (11114211313), we get a palindrome (42425452424).

The spelling of 31311241111 in words is "thirty-one billion, three hundred eleven million, two hundred forty-one thousand, one hundred eleven".