2111231213 has 16 divisors (see below), whose sum is σ = 2615894400. Its totient is φ = 1659203136.

The previous prime is 2111231141. The next prime is 2111231261. The reversal of 2111231213 is 3121321112.

It is a cyclic number.

It is not a de Polignac number, because 2111231213 - 2²² = 2107036909 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2111231191 and 2111231200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111231293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64295 + ... + 91412.

It is an arithmetic number, because the mean of its divisors is an integer number (163493400).

Almost surely, 2^2111231213 is an apocalyptic number.

It is an amenable number.

2111231213 is a deficient number, since it is larger than the sum of its proper divisors (504663187).

2111231213 is a wasteful number, since it uses less digits than its factorization.

2111231213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155876.

The product of its digits is 72, while the sum is 17.

The square root of 2111231213 is about 45948.1361210659. The cubic root of 2111231213 is about 1282.8580369251.

Adding to 2111231213 its reverse (3121321112), we get a palindrome (5232552325).

It can be divided in two parts, 21112 and 31213, that added together give a palindrome (52325).

The spelling of 2111231213 in words is "two billion, one hundred eleven million, two hundred thirty-one thousand, two hundred thirteen".