31201113111 has 8 divisors (see below), whose sum is σ = 47544553344. Its totient is φ = 17829207480.

The previous prime is 31201113101. The next prime is 31201113179. The reversal of 31201113111 is 11131110213.

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

It is not a de Polignac number, because 31201113111 - 2¹⁰ = 31201112087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31201113101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 742883625 + ... + 742883666.

It is an arithmetic number, because the mean of its divisors is an integer number (5943069168).

Almost surely, 2^31201113111 is an apocalyptic number.

31201113111 is a deficient number, since it is larger than the sum of its proper divisors (16343440233).

31201113111 is a wasteful number, since it uses less digits than its factorization.

31201113111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485767301.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 31201113111 its reverse (11131110213), we get a palindrome (42332223324).

The spelling of 31201113111 in words is "thirty-one billion, two hundred one million, one hundred thirteen thousand, one hundred eleven".