2031220311 has 8 divisors (see below), whose sum is σ = 2722042224. Its totient is φ = 1347272640.

The previous prime is 2031220309. The next prime is 2031220343. The reversal of 2031220311 is 1130221302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2031220311 - 2¹ = 2031220309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031220361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1717870 + ... + 1719051.

It is an arithmetic number, because the mean of its divisors is an integer number (340255278).

Almost surely, 2^2031220311 is an apocalyptic number.

2031220311 is a deficient number, since it is larger than the sum of its proper divisors (690821913).

2031220311 is a wasteful number, since it uses less digits than its factorization.

2031220311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3437121.

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

The square root of 2031220311 is about 45069.0615722138. The cubic root of 2031220311 is about 1266.4430845524.

Adding to 2031220311 its reverse (1130221302), we get a palindrome (3161441613).

Subtracting from 2031220311 its reverse (1130221302), we obtain a palindrome (900999009).

The spelling of 2031220311 in words is "two billion, thirty-one million, two hundred twenty thousand, three hundred eleven".