31231110100103 has 4 divisors (see below), whose sum is σ = 31607388535128. Its totient is φ = 30854831665080.

The previous prime is 31231110100067. The next prime is 31231110100111. The reversal of 31231110100103 is 30100101113213.

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 31231110100103 - 2⁶ = 31231110100039 is a prime.

It is a super-2 number, since 2×31231110100103² (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 (31231110150103) 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, 188139217388 + ... + 188139217553.

It is an arithmetic number, because the mean of its divisors is an integer number (7901847133782).

Almost surely, 2^{31231110100103} is an apocalyptic number.

31231110100103 is a deficient number, since it is larger than the sum of its proper divisors (376278435025).

31231110100103 is an equidigital number, since it uses as much as digits as its factorization.

31231110100103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376278435024.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 31231110100103 its reverse (30100101113213), we get a palindrome (61331211213316).

The spelling of 31231110100103 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred ten million, one hundred thousand, one hundred three".