131201201009 has 2 divisors, whose sum is σ = 131201201010. Its totient is φ = 131201201008.

The previous prime is 131201200981. The next prime is 131201201023. The reversal of 131201201009 is 900102102131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66614061409 + 64587139600 = 258097^2 + 254140^2 .

It is a cyclic number.

It is not a de Polignac number, because 131201201009 - 2²⁴ = 131184423793 is a prime.

It is not a weakly prime, because it can be changed into another prime (131201201069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65600600504 + 65600600505.

It is an arithmetic number, because the mean of its divisors is an integer number (65600600505).

Almost surely, 2^131201201009 is an apocalyptic number.

It is an amenable number.

131201201009 is a deficient number, since it is larger than the sum of its proper divisors (1).

131201201009 is an equidigital number, since it uses as much as digits as its factorization.

131201201009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The spelling of 131201201009 in words is "one hundred thirty-one billion, two hundred one million, two hundred one thousand, nine".