31213221103202 has 8 divisors (see below), whose sum is σ = 46819856328300. Its totient is φ = 15606602327104.

The previous prime is 31213221103199. The next prime is 31213221103219. The reversal of 31213221103202 is 20230112231213.

It can be written as a sum of positive squares in 2 ways, for example, as 22899392779561 + 8313828323641 = 4785331^2 + 2883371^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3313574 + ... + 8567742.

Almost surely, 2^{31213221103202} is an apocalyptic number.

31213221103202 is a deficient number, since it is larger than the sum of its proper divisors (15606635225098).

31213221103202 is a wasteful number, since it uses less digits than its factorization.

31213221103202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8224500.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31213221103202 its reverse (20230112231213), we get a palindrome (51443333334415).

The spelling of 31213221103202 in words is "thirty-one trillion, two hundred thirteen billion, two hundred twenty-one million, one hundred three thousand, two hundred two".