2031213111 has 4 divisors (see below), whose sum is σ = 2708284152. Its totient is φ = 1354142072.

The previous prime is 2031213097. The next prime is 2031213131. The reversal of 2031213111 is 1113121302.

It is a happy number.

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 2031213111 - 2²⁵ = 1997658679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031213131) 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 3 ways as a sum of consecutive naturals, for example, 338535516 + ... + 338535521.

It is an arithmetic number, because the mean of its divisors is an integer number (677071038).

Almost surely, 2^2031213111 is an apocalyptic number.

2031213111 is a deficient number, since it is larger than the sum of its proper divisors (677071041).

2031213111 is an equidigital number, since it uses as much as digits as its factorization.

2031213111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677071040.

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

The square root of 2031213111 is about 45068.9816947310. The cubic root of 2031213111 is about 1266.4415881776.

Adding to 2031213111 its reverse (1113121302), we get a palindrome (3144334413).

The spelling of 2031213111 in words is "two billion, thirty-one million, two hundred thirteen thousand, one hundred eleven".