131111021201 has 2 divisors, whose sum is σ = 131111021202. Its totient is φ = 131111021200.

The previous prime is 131111021191. The next prime is 131111021207. The reversal of 131111021201 is 102120111131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110540290576 + 20570730625 = 332476^2 + 143425^2 .

It is a cyclic number.

It is not a de Polignac number, because 131111021201 - 2²² = 131106826897 is a prime.

It is not a weakly prime, because it can be changed into another prime (131111021207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65555510600 + 65555510601.

It is an arithmetic number, because the mean of its divisors is an integer number (65555510601).

Almost surely, 2^131111021201 is an apocalyptic number.

It is an amenable number.

131111021201 is a deficient number, since it is larger than the sum of its proper divisors (1).

131111021201 is an equidigital number, since it uses as much as digits as its factorization.

131111021201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 131111021201 its reverse (102120111131), we get a palindrome (233231132332).

The spelling of 131111021201 in words is "one hundred thirty-one billion, one hundred eleven million, twenty-one thousand, two hundred one".