1211300131 has 2 divisors, whose sum is σ = 1211300132. Its totient is φ = 1211300130.

The previous prime is 1211300113. The next prime is 1211300143. The reversal of 1211300131 is 1310031121.

Together with previous prime (1211300113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211300131 - 2¹¹ = 1211298083 is a prime.

It is a super-2 number, since 2×1211300131² = 2934496014721234322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1211300161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605650065 + 605650066.

It is an arithmetic number, because the mean of its divisors is an integer number (605650066).

Almost surely, 2^1211300131 is an apocalyptic number.

1211300131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211300131 is an equidigital number, since it uses as much as digits as its factorization.

1211300131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1211300131 is about 34803.7373136851. The cubic root of 1211300131 is about 1065.9837592434.

Adding to 1211300131 its reverse (1310031121), we get a palindrome (2521331252).

The spelling of 1211300131 in words is "one billion, two hundred eleven million, three hundred thousand, one hundred thirty-one".