131211222023741 has 2 divisors, whose sum is σ = 131211222023742. Its totient is φ = 131211222023740.

The previous prime is 131211222023731. The next prime is 131211222023801. The reversal of 131211222023741 is 147320222112131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122802323987641 + 8408898036100 = 11081621^2 + 2899810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131211222023741 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131211222023698 and 131211222023707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131211222023731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65605611011870 + 65605611011871.

It is an arithmetic number, because the mean of its divisors is an integer number (65605611011871).

Almost surely, 2^{131211222023741} is an apocalyptic number.

It is an amenable number.

131211222023741 is a deficient number, since it is larger than the sum of its proper divisors (1).

131211222023741 is an equidigital number, since it uses as much as digits as its factorization.

131211222023741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 32.

Adding to 131211222023741 its reverse (147320222112131), we get a palindrome (278531444135872).

The spelling of 131211222023741 in words is "one hundred thirty-one trillion, two hundred eleven billion, two hundred twenty-two million, twenty-three thousand, seven hundred forty-one".