31111112223 has 6 divisors (see below), whose sum is σ = 44938273224. Its totient is φ = 20740741476.

The previous prime is 31111112161. The next prime is 31111112231. The reversal of 31111112223 is 32221111113.

It is not a de Polignac number, because 31111112223 - 2⁹ = 31111111711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31111112196 and 31111112205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31111112243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1728395115 + ... + 1728395132.

It is an arithmetic number, because the mean of its divisors is an integer number (7489712204).

Almost surely, 2^31111112223 is an apocalyptic number.

31111112223 is a deficient number, since it is larger than the sum of its proper divisors (13827161001).

31111112223 is a wasteful number, since it uses less digits than its factorization.

31111112223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456790253 (or 3456790250 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 31111112223 its reverse (32221111113), we get a palindrome (63332223336).

The spelling of 31111112223 in words is "thirty-one billion, one hundred eleven million, one hundred twelve thousand, two hundred twenty-three".