2123212311 has 32 divisors (see below), whose sum is σ = 3443715840. Its totient is φ = 1282197600.

The previous prime is 2123212309. The next prime is 2123212313. The reversal of 2123212311 is 1132123212.

It is an interprime number because it is at equal distance from previous prime (2123212309) and next prime (2123212313).

It is not a de Polignac number, because 2123212311 - 2¹ = 2123212309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123212313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71421 + ... + 96681.

It is an arithmetic number, because the mean of its divisors is an integer number (107616120).

Almost surely, 2^2123212311 is an apocalyptic number.

2123212311 is a deficient number, since it is larger than the sum of its proper divisors (1320503529).

2123212311 is a wasteful number, since it uses less digits than its factorization.

2123212311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25564 (or 25558 counting only the distinct ones).

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

The square root of 2123212311 is about 46078.3279970096. The cubic root of 2123212311 is about 1285.2801724727.

Adding to 2123212311 its reverse (1132123212), we get a palindrome (3255335523).

The spelling of 2123212311 in words is "two billion, one hundred twenty-three million, two hundred twelve thousand, three hundred eleven".