31020011223 has 4 divisors (see below), whose sum is σ = 41360014968. Its totient is φ = 20680007480.

The previous prime is 31020011221. The next prime is 31020011227. The reversal of 31020011223 is 32211002013.

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 31020011223 - 2¹ = 31020011221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020011221) 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, 5170001868 + ... + 5170001873.

It is an arithmetic number, because the mean of its divisors is an integer number (10340003742).

Almost surely, 2^31020011223 is an apocalyptic number.

31020011223 is a deficient number, since it is larger than the sum of its proper divisors (10340003745).

31020011223 is a wasteful number, since it uses less digits than its factorization.

31020011223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10340003744.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31020011223 its reverse (32211002013), we get a palindrome (63231013236).

The spelling of 31020011223 in words is "thirty-one billion, twenty million, eleven thousand, two hundred twenty-three".