31233010111111 has 4 divisors (see below), whose sum is σ = 32310010459800. Its totient is φ = 30156009762424.

The previous prime is 31233010111103. The next prime is 31233010111117. The reversal of 31233010111111 is 11111101033213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31233010111111 - 2³ = 31233010111103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31233010111117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 538500174301 + ... + 538500174358.

It is an arithmetic number, because the mean of its divisors is an integer number (8077502614950).

Almost surely, 2^{31233010111111} is an apocalyptic number.

31233010111111 is a deficient number, since it is larger than the sum of its proper divisors (1077000348689).

31233010111111 is a wasteful number, since it uses less digits than its factorization.

31233010111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077000348688.

The product of its (nonzero) digits is 54, while the sum is 19.

Adding to 31233010111111 its reverse (11111101033213), we get a palindrome (42344111144324).

The spelling of 31233010111111 in words is "thirty-one trillion, two hundred thirty-three billion, ten million, one hundred eleven thousand, one hundred eleven".