31231323010103 has 4 divisors (see below), whose sum is σ = 32875076852760. Its totient is φ = 29587569167448.

The previous prime is 31231323010087. The next prime is 31231323010109. The reversal of 31231323010103 is 30101032313213.

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 31231323010103 - 2⁴ = 31231323010087 is a prime.

It is a super-2 number, since 2×31231323010103² (a number of 28 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 (31231323010109) 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, 821876921300 + ... + 821876921337.

It is an arithmetic number, because the mean of its divisors is an integer number (8218769213190).

Almost surely, 2^{31231323010103} is an apocalyptic number.

31231323010103 is a deficient number, since it is larger than the sum of its proper divisors (1643753842657).

31231323010103 is a wasteful number, since it uses less digits than its factorization.

31231323010103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643753842656.

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

Adding to 31231323010103 its reverse (30101032313213), we get a palindrome (61332355323316).

The spelling of 31231323010103 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred twenty-three million, ten thousand, one hundred three".