31112213202223 has 4 divisors (see below), whose sum is σ = 31112669856168. Its totient is φ = 31111756548280.

The previous prime is 31112213202211. The next prime is 31112213202229. The reversal of 31112213202223 is 32220231221113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31112213202223 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 (31112213202229) 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, 228224761 + ... + 228361042.

It is an arithmetic number, because the mean of its divisors is an integer number (7778167464042).

Almost surely, 2^{31112213202223} is an apocalyptic number.

31112213202223 is a deficient number, since it is larger than the sum of its proper divisors (456653945).

31112213202223 is an equidigital number, since it uses as much as digits as its factorization.

31112213202223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456653944.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31112213202223 its reverse (32220231221113), we get a palindrome (63332444423336).

The spelling of 31112213202223 in words is "thirty-one trillion, one hundred twelve billion, two hundred thirteen million, two hundred two thousand, two hundred twenty-three".