31003312111 has 6 divisors (see below), whose sum is σ = 32720947512. Its totient is φ = 29371558500.

The previous prime is 31003312103. The next prime is 31003312121. The reversal of 31003312111 is 11121330013.

It is not a de Polignac number, because 31003312111 - 2³ = 31003312103 is a prime.

It is a super-2 number, since 2×31003312111² (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 (31003312121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42940515 + ... + 42941236.

It is an arithmetic number, because the mean of its divisors is an integer number (5453491252).

Almost surely, 2^31003312111 is an apocalyptic number.

31003312111 is a deficient number, since it is larger than the sum of its proper divisors (1717635401).

31003312111 is an equidigital number, since it uses as much as digits as its factorization.

31003312111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85881789 (or 85881770 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31003312111 its reverse (11121330013), we get a palindrome (42124642124).

The spelling of 31003312111 in words is "thirty-one billion, three million, three hundred twelve thousand, one hundred eleven".