2111212233 has 12 divisors (see below), whose sum is σ = 3284108100. Its totient is φ = 1299207456.

The previous prime is 2111212219. The next prime is 2111212241. The reversal of 2111212233 is 3322121112.

It can be written as a sum of positive squares in 2 ways, for example, as 795916944 + 1315295289 = 28212^2 + 36267^2 .

It is not a de Polignac number, because 2111212233 - 2⁴ = 2111212217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2111212253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9022158 + ... + 9022391.

It is an arithmetic number, because the mean of its divisors is an integer number (273675675).

Almost surely, 2^2111212233 is an apocalyptic number.

It is an amenable number.

2111212233 is a deficient number, since it is larger than the sum of its proper divisors (1172895867).

2111212233 is a wasteful number, since it uses less digits than its factorization.

2111212233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18044568 (or 18044565 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 2111212233 is about 45947.9295833882. The cubic root of 2111212233 is about 1282.8541926093.

Adding to 2111212233 its reverse (3322121112), we get a palindrome (5433333345).

The spelling of 2111212233 in words is "two billion, one hundred eleven million, two hundred twelve thousand, two hundred thirty-three".