31213321203 has 8 divisors (see below), whose sum is σ = 41618963088. Its totient is φ = 20808280064.

The previous prime is 31213321193. The next prime is 31213321207. The reversal of 31213321203 is 30212331213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31213321203 - 2¹⁴ = 31213304819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31213321203.

It is not an unprimeable number, because it can be changed into a prime (31213321207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10350 + ... + 250067.

It is an arithmetic number, because the mean of its divisors is an integer number (5202370386).

Almost surely, 2^31213321203 is an apocalyptic number.

31213321203 is a deficient number, since it is larger than the sum of its proper divisors (10405641885).

31213321203 is a wasteful number, since it uses less digits than its factorization.

31213321203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300373.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31213321203 its reverse (30212331213), we get a palindrome (61425652416).

It can be divided in two parts, 312133 and 21203, that added together give a triangular number (333336 = T₈₁₆).

The spelling of 31213321203 in words is "thirty-one billion, two hundred thirteen million, three hundred twenty-one thousand, two hundred three".