31212003312223 has 4 divisors (see below), whose sum is σ = 31212022532920. Its totient is φ = 31211984091528.

The previous prime is 31212003312221. The next prime is 31212003312247. The reversal of 31212003312223 is 32221330021213.

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 31212003312223 - 2¹ = 31212003312221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212003312221) 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, 6924288 + ... + 10505701.

It is an arithmetic number, because the mean of its divisors is an integer number (7803005633230).

Almost surely, 2^{31212003312223} is an apocalyptic number.

31212003312223 is a deficient number, since it is larger than the sum of its proper divisors (19220697).

31212003312223 is a wasteful number, since it uses less digits than its factorization.

31212003312223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19220696.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31212003312223 its reverse (32221330021213), we get a palindrome (63433333333436).

The spelling of 31212003312223 in words is "thirty-one trillion, two hundred twelve billion, three million, three hundred twelve thousand, two hundred twenty-three".