2131212133 has 4 divisors (see below), whose sum is σ = 2176557120. Its totient is φ = 2085867148.

The previous prime is 2131212077. The next prime is 2131212163. The reversal of 2131212133 is 3312121312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131212133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2131212133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131212163) 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, 22672423 + ... + 22672516.

It is an arithmetic number, because the mean of its divisors is an integer number (544139280).

Almost surely, 2^2131212133 is an apocalyptic number.

It is an amenable number.

2131212133 is a deficient number, since it is larger than the sum of its proper divisors (45344987).

2131212133 is an equidigital number, since it uses as much as digits as its factorization.

2131212133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45344986.

The product of its digits is 216, while the sum is 19.

The square root of 2131212133 is about 46165.0531571231. The cubic root of 2131212133 is about 1286.8923720653.

Adding to 2131212133 its reverse (3312121312), we get a palindrome (5443333445).

The spelling of 2131212133 in words is "two billion, one hundred thirty-one million, two hundred twelve thousand, one hundred thirty-three".