31421221003204 has 12 divisors (see below), whose sum is σ = 54987397767484. Its totient is φ = 15710535926784.

The previous prime is 31421221003189. The next prime is 31421221003217. The reversal of 31421221003204 is 40230012212413.

It can be written as a sum of positive squares in 2 ways, for example, as 25982773128900 + 5438447874304 = 5097330^2 + 2332048^2 .

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, 17690277 + ... + 19385260.

Almost surely, 2^{31421221003204} is an apocalyptic number.

It is an amenable number.

31421221003204 is a deficient number, since it is larger than the sum of its proper divisors (23566176764280).

31421221003204 is a wasteful number, since it uses less digits than its factorization.

31421221003204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37287414 (or 37287412 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 31421221003204 its reverse (40230012212413), we get a palindrome (71651233215617).

The spelling of 31421221003204 in words is "thirty-one trillion, four hundred twenty-one billion, two hundred twenty-one million, three thousand, two hundred four".