31212003221203 has 4 divisors (see below), whose sum is σ = 35670860824240. Its totient is φ = 26753145618168.

The previous prime is 31212003221183. The next prime is 31212003221237. The reversal of 31212003221203 is 30212230021213.

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

It is a cyclic number.

It is not a de Polignac number, because 31212003221203 - 2⁵ = 31212003221171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31212003221603) 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, 2229428801508 + ... + 2229428801521.

It is an arithmetic number, because the mean of its divisors is an integer number (8917715206060).

Almost surely, 2^{31212003221203} is an apocalyptic number.

31212003221203 is a deficient number, since it is larger than the sum of its proper divisors (4458857603037).

31212003221203 is an equidigital number, since it uses as much as digits as its factorization.

31212003221203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4458857603036.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31212003221203 its reverse (30212230021213), we get a palindrome (61424233242416).

The spelling of 31212003221203 in words is "thirty-one trillion, two hundred twelve billion, three million, two hundred twenty-one thousand, two hundred three".