31223231103 has 4 divisors (see below), whose sum is σ = 41630974808. Its totient is φ = 20815487400.

The previous prime is 31223231063. The next prime is 31223231153. The reversal of 31223231103 is 30113232213.

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

It is not a de Polignac number, because 31223231103 - 2⁸ = 31223230847 is a prime.

It is a super-2 number, since 2×31223231103² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31223231103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223231153) 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 3 ways as a sum of consecutive naturals, for example, 5203871848 + ... + 5203871853.

It is an arithmetic number, because the mean of its divisors is an integer number (10407743702).

Almost surely, 2^31223231103 is an apocalyptic number.

31223231103 is a deficient number, since it is larger than the sum of its proper divisors (10407743705).

31223231103 is a wasteful number, since it uses less digits than its factorization.

31223231103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10407743704.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31223231103 its reverse (30113232213), we get a palindrome (61336463316).

The spelling of 31223231103 in words is "thirty-one billion, two hundred twenty-three million, two hundred thirty-one thousand, one hundred three".