131921011 has 2 divisors, whose sum is σ = 131921012. Its totient is φ = 131921010.

The previous prime is 131920981. The next prime is 131921039. The reversal of 131921011 is 110129131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131921011 - 2⁹ = 131920499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131921011.

It is not a weakly prime, because it can be changed into another prime (131921311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65960505 + 65960506.

It is an arithmetic number, because the mean of its divisors is an integer number (65960506).

Almost surely, 2^131921011 is an apocalyptic number.

131921011 is a deficient number, since it is larger than the sum of its proper divisors (1).

131921011 is an equidigital number, since it uses as much as digits as its factorization.

131921011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 19.

The square root of 131921011 is about 11485.6872236710. The cubic root of 131921011 is about 509.0627551308.

The spelling of 131921011 in words is "one hundred thirty-one million, nine hundred twenty-one thousand, eleven".