31023103213031 has 4 divisors (see below), whose sum is σ = 32655898119000. Its totient is φ = 29390308307064.

The previous prime is 31023103213027. The next prime is 31023103213061. The reversal of 31023103213031 is 13031230132013.

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 31023103213031 - 2² = 31023103213027 is a prime.

It is a super-2 number, since 2×31023103213031² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31023103212988 and 31023103213006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023103213001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 816397452956 + ... + 816397452993.

It is an arithmetic number, because the mean of its divisors is an integer number (8163974529750).

Almost surely, 2^{31023103213031} is an apocalyptic number.

31023103213031 is a deficient number, since it is larger than the sum of its proper divisors (1632794905969).

31023103213031 is a wasteful number, since it uses less digits than its factorization.

31023103213031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632794905968.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 31023103213031 its reverse (13031230132013), we get a palindrome (44054333345044).

The spelling of 31023103213031 in words is "thirty-one trillion, twenty-three billion, one hundred three million, two hundred thirteen thousand, thirty-one".