31011012223 has 4 divisors (see below), whose sum is σ = 32011367488. Its totient is φ = 30010656960.

The previous prime is 31011012167. The next prime is 31011012259. The reversal of 31011012223 is 32221011013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32221011013 = 17 ⋅1895353589.

It is a cyclic number.

It is not a de Polignac number, because 31011012223 - 2²¹ = 31008915071 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 31011012197 and 31011012206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31011012293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500177586 + ... + 500177647.

It is an arithmetic number, because the mean of its divisors is an integer number (8002841872).

Almost surely, 2^31011012223 is an apocalyptic number.

31011012223 is a deficient number, since it is larger than the sum of its proper divisors (1000355265).

31011012223 is a wasteful number, since it uses less digits than its factorization.

31011012223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000355264.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31011012223 its reverse (32221011013), we get a palindrome (63232023236).

The spelling of 31011012223 in words is "thirty-one billion, eleven million, twelve thousand, two hundred twenty-three".