31212303303 has 4 divisors (see below), whose sum is σ = 41616404408. Its totient is φ = 20808202200.

The previous prime is 31212303259. The next prime is 31212303319. The reversal of 31212303303 is 30330321213.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31212303303 - 2¹³ = 31212295111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31212303303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212303373) 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, 5202050548 + ... + 5202050553.

It is an arithmetic number, because the mean of its divisors is an integer number (10404101102).

Almost surely, 2^31212303303 is an apocalyptic number.

31212303303 is a deficient number, since it is larger than the sum of its proper divisors (10404101105).

31212303303 is a wasteful number, since it uses less digits than its factorization.

31212303303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10404101104.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 31212303303 its reverse (30330321213), we get a palindrome (61542624516).

The spelling of 31212303303 in words is "thirty-one billion, two hundred twelve million, three hundred three thousand, three hundred three".