31103321300031 has 16 divisors (see below), whose sum is σ = 41791553740800. Its totient is φ = 20575599058080.

The previous prime is 31103321299943. The next prime is 31103321300047. The reversal of 31103321300031 is 13000312330113.

It is not a de Polignac number, because 31103321300031 - 2²² = 31103317105727 is a prime.

It is a super-2 number, since 2×31103321300031² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31103321299980 and 31103321300007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103321300731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34664175 + ... + 35550128.

It is an arithmetic number, because the mean of its divisors is an integer number (2611972108800).

Almost surely, 2^{31103321300031} is an apocalyptic number.

31103321300031 is a deficient number, since it is larger than the sum of its proper divisors (10688232440769).

31103321300031 is a wasteful number, since it uses less digits than its factorization.

31103321300031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70215446.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 31103321300031 its reverse (13000312330113), we get a palindrome (44103633630144).

The spelling of 31103321300031 in words is "thirty-one trillion, one hundred three billion, three hundred twenty-one million, three hundred thousand, thirty-one".