131926121 has 2 divisors, whose sum is σ = 131926122. Its totient is φ = 131926120.

The previous prime is 131926087. The next prime is 131926141. The reversal of 131926121 is 121629131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116402521 + 15523600 = 10789^2 + 3940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131926121 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (131926141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65963060 + 65963061.

It is an arithmetic number, because the mean of its divisors is an integer number (65963061).

Almost surely, 2^131926121 is an apocalyptic number.

It is an amenable number.

131926121 is a deficient number, since it is larger than the sum of its proper divisors (1).

131926121 is an equidigital number, since it uses as much as digits as its factorization.

131926121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 26.

The square root of 131926121 is about 11485.9096722898. The cubic root of 131926121 is about 509.0693279455.

The spelling of 131926121 in words is "one hundred thirty-one million, nine hundred twenty-six thousand, one hundred twenty-one".