2131240211 has 4 divisors (see below), whose sum is σ = 2132910432. Its totient is φ = 2129569992.

The previous prime is 2131240201. The next prime is 2131240217. The reversal of 2131240211 is 1120421312.

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-2131240211 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 2131240211.

It is not an unprimeable number, because it can be changed into a prime (2131240217) 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, 833195 + ... + 835748.

It is an arithmetic number, because the mean of its divisors is an integer number (533227608).

Almost surely, 2^2131240211 is an apocalyptic number.

2131240211 is a deficient number, since it is larger than the sum of its proper divisors (1670221).

2131240211 is a wasteful number, since it uses less digits than its factorization.

2131240211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670220.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2131240211 is about 46165.3572606126. The cubic root of 2131240211 is about 1286.8980234979.

Adding to 2131240211 its reverse (1120421312), we get a palindrome (3251661523).

The spelling of 2131240211 in words is "two billion, one hundred thirty-one million, two hundred forty thousand, two hundred eleven".