31210103123 has 4 divisors (see below), whose sum is σ = 33045991560. Its totient is φ = 29374214688.

The previous prime is 31210103101. The next prime is 31210103143. The reversal of 31210103123 is 32130101213.

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 31210103123 - 2⁶ = 31210103059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 1835888419 = 31210103123 / (3 + 1 + 2 + 1 + 0 + 1 + 0 + 3 + 1 + 2 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31210103143) 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, 917944193 + ... + 917944226.

It is an arithmetic number, because the mean of its divisors is an integer number (8261497890).

Almost surely, 2^31210103123 is an apocalyptic number.

31210103123 is a deficient number, since it is larger than the sum of its proper divisors (1835888437).

31210103123 is a wasteful number, since it uses less digits than its factorization.

31210103123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835888436.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31210103123 its reverse (32130101213), we get a palindrome (63340204336).

The spelling of 31210103123 in words is "thirty-one billion, two hundred ten million, one hundred three thousand, one hundred twenty-three".