31122311202223 has 4 divisors (see below), whose sum is σ = 31331185774200. Its totient is φ = 30913436630248.

The previous prime is 31122311202217. The next prime is 31122311202313. The reversal of 31122311202223 is 32220211322113.

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 31122311202223 - 2²¹ = 31122309105071 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 (31122311292223) 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, 104437285765 + ... + 104437286062.

It is an arithmetic number, because the mean of its divisors is an integer number (7832796443550).

Almost surely, 2^{31122311202223} is an apocalyptic number.

31122311202223 is a deficient number, since it is larger than the sum of its proper divisors (208874571977).

31122311202223 is a wasteful number, since it uses less digits than its factorization.

31122311202223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208874571976.

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

Adding to 31122311202223 its reverse (32220211322113), we get a palindrome (63342522524336).

The spelling of 31122311202223 in words is "thirty-one trillion, one hundred twenty-two billion, three hundred eleven million, two hundred two thousand, two hundred twenty-three".