131211133 has 2 divisors, whose sum is σ = 131211134. Its totient is φ = 131211132.

The previous prime is 131211097. The next prime is 131211137. The reversal of 131211133 is 331112131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84603204 + 46607929 = 9198^2 + 6827^2 .

It is a cyclic number.

It is not a de Polignac number, because 131211133 - 2²¹ = 129113981 is a prime.

It is a super-2 number, since 2×131211133² = 34432722846287378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131211137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65605566 + 65605567.

It is an arithmetic number, because the mean of its divisors is an integer number (65605567).

Almost surely, 2^131211133 is an apocalyptic number.

It is an amenable number.

131211133 is a deficient number, since it is larger than the sum of its proper divisors (1).

131211133 is an equidigital number, since it uses as much as digits as its factorization.

131211133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54, while the sum is 16.

The square root of 131211133 is about 11454.7428168423. The cubic root of 131211133 is about 508.1480092934.

Adding to 131211133 its reverse (331112131), we get a palindrome (462323264).

The spelling of 131211133 in words is "one hundred thirty-one million, two hundred eleven thousand, one hundred thirty-three".