31012123303 has 4 divisors (see below), whose sum is σ = 35442426640. Its totient is φ = 26581819968.

The previous prime is 31012123283. The next prime is 31012123319. The reversal of 31012123303 is 30332121013.

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 31012123303 - 2²⁵ = 30978568871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31012123343) 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, 2215151658 + ... + 2215151671.

It is an arithmetic number, because the mean of its divisors is an integer number (8860606660).

Almost surely, 2^31012123303 is an apocalyptic number.

31012123303 is a deficient number, since it is larger than the sum of its proper divisors (4430303337).

31012123303 is an equidigital number, since it uses as much as digits as its factorization.

31012123303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4430303336.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31012123303 its reverse (30332121013), we get a palindrome (61344244316).

The spelling of 31012123303 in words is "thirty-one billion, twelve million, one hundred twenty-three thousand, three hundred three".