31213221203 has 2 divisors, whose sum is σ = 31213221204. Its totient is φ = 31213221202.

The previous prime is 31213221197. The next prime is 31213221287. The reversal of 31213221203 is 30212231213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31213221203 - 2¹⁰ = 31213220179 is a prime.

It is not a weakly prime, because it can be changed into another prime (31213221103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606610601 + 15606610602.

It is an arithmetic number, because the mean of its divisors is an integer number (15606610602).

Almost surely, 2^31213221203 is an apocalyptic number.

31213221203 is a deficient number, since it is larger than the sum of its proper divisors (1).

31213221203 is an equidigital number, since it uses as much as digits as its factorization.

31213221203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31213221203 its reverse (30212231213), we get a palindrome (61425452416).

The spelling of 31213221203 in words is "thirty-one billion, two hundred thirteen million, two hundred twenty-one thousand, two hundred three".