2321211131 has 4 divisors (see below), whose sum is σ = 2339488512. Its totient is φ = 2302933752.

The previous prime is 2321211121. The next prime is 2321211163. The reversal of 2321211131 is 1311121232.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2321211131 is a prime.

It is a super-2 number, since 2×2321211131² = 10776042229356598322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2321211121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9138500 + ... + 9138753.

It is an arithmetic number, because the mean of its divisors is an integer number (584872128).

Almost surely, 2^2321211131 is an apocalyptic number.

2321211131 is a deficient number, since it is larger than the sum of its proper divisors (18277381).

2321211131 is a wasteful number, since it uses less digits than its factorization.

2321211131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18277380.

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

The square root of 2321211131 is about 48178.9490441624. The cubic root of 2321211131 is about 1324.0515117264.

Adding to 2321211131 its reverse (1311121232), we get a palindrome (3632332363).

It can be divided in two parts, 23212 and 11131, that added together give a palindrome (34343).

The spelling of 2321211131 in words is "two billion, three hundred twenty-one million, two hundred eleven thousand, one hundred thirty-one".