1211340131 has 2 divisors, whose sum is σ = 1211340132. Its totient is φ = 1211340130.

The previous prime is 1211340059. The next prime is 1211340157. The reversal of 1211340131 is 1310431121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211340131 is a prime.

It is a super-2 number, since 2×1211340131² = 2934689825942194322, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1211340181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605670065 + 605670066.

It is an arithmetic number, because the mean of its divisors is an integer number (605670066).

Almost surely, 2^1211340131 is an apocalyptic number.

1211340131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211340131 is an equidigital number, since it uses as much as digits as its factorization.

1211340131 is an evil number, because the sum of its binary digits is even.

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

The square root of 1211340131 is about 34804.3119598707. The cubic root of 1211340131 is about 1065.9954928840.

Adding to 1211340131 its reverse (1310431121), we get a palindrome (2521771252).

The spelling of 1211340131 in words is "one billion, two hundred eleven million, three hundred forty thousand, one hundred thirty-one".