131141111213621 has 2 divisors, whose sum is σ = 131141111213622. Its totient is φ = 131141111213620.

The previous prime is 131141111213611. The next prime is 131141111213663. The reversal of 131141111213621 is 126312111141131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112763479570225 + 18377631643396 = 10619015^2 + 4286914^2 .

It is an emirp because it is prime and its reverse (126312111141131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131141111213621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131141111213611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65570555606810 + 65570555606811.

It is an arithmetic number, because the mean of its divisors is an integer number (65570555606811).

Almost surely, 2^{131141111213621} is an apocalyptic number.

It is an amenable number.

131141111213621 is a deficient number, since it is larger than the sum of its proper divisors (1).

131141111213621 is an equidigital number, since it uses as much as digits as its factorization.

131141111213621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 29.

Adding to 131141111213621 its reverse (126312111141131), we get a palindrome (257453222354752).

The spelling of 131141111213621 in words is "one hundred thirty-one trillion, one hundred forty-one billion, one hundred eleven million, two hundred thirteen thousand, six hundred twenty-one".