2111312031 has 8 divisors (see below), whose sum is σ = 2817662640. Its totient is φ = 1406251392.

The previous prime is 2111312011. The next prime is 2111312033. The reversal of 2111312031 is 1302131112.

It is a happy number.

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

It is not a de Polignac number, because 2111312031 - 2⁷ = 2111311903 is a prime.

It is a super-2 number, since 2×2111312031² = 8915276984490689922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2111312031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111312033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318666 + ... + 325223.

It is an arithmetic number, because the mean of its divisors is an integer number (352207830).

Almost surely, 2^2111312031 is an apocalyptic number.

2111312031 is a deficient number, since it is larger than the sum of its proper divisors (706350609).

2111312031 is a wasteful number, since it uses less digits than its factorization.

2111312031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644985.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 2111312031 is about 45949.0155607277. The cubic root of 2111312031 is about 1282.8744059988.

Adding to 2111312031 its reverse (1302131112), we get a palindrome (3413443143).

The spelling of 2111312031 in words is "two billion, one hundred eleven million, three hundred twelve thousand, thirty-one".