2131011211 has 4 divisors (see below), whose sum is σ = 2435441392. Its totient is φ = 1826581032.

The previous prime is 2131011167. The next prime is 2131011229. The reversal of 2131011211 is 1121101312.

It is a happy number.

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-2131011211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131011191 and 2131011200.

It is not an unprimeable number, because it can be changed into a prime (2131014211) 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, 152215080 + ... + 152215093.

It is an arithmetic number, because the mean of its divisors is an integer number (608860348).

Almost surely, 2^2131011211 is an apocalyptic number.

2131011211 is a deficient number, since it is larger than the sum of its proper divisors (304430181).

2131011211 is an equidigital number, since it uses as much as digits as its factorization.

2131011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304430180.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 2131011211 is about 46162.8769792352. The cubic root of 2131011211 is about 1286.8519298038.

Adding to 2131011211 its reverse (1121101312), we get a palindrome (3252112523).

The spelling of 2131011211 in words is "two billion, one hundred thirty-one million, eleven thousand, two hundred eleven".