131142131223421 has 2 divisors, whose sum is σ = 131142131223422. Its totient is φ = 131142131223420.

The previous prime is 131142131223379. The next prime is 131142131223451. The reversal of 131142131223421 is 124322131241131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129040762071321 + 2101369152100 = 11359611^2 + 1449610^2 .

It is an emirp because it is prime and its reverse (124322131241131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131142131223421 - 2⁷ = 131142131223293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131142131223451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65571065611710 + 65571065611711.

It is an arithmetic number, because the mean of its divisors is an integer number (65571065611711).

Almost surely, 2^{131142131223421} is an apocalyptic number.

It is an amenable number.

131142131223421 is a deficient number, since it is larger than the sum of its proper divisors (1).

131142131223421 is an equidigital number, since it uses as much as digits as its factorization.

131142131223421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 31.

Adding to 131142131223421 its reverse (124322131241131), we get a palindrome (255464262464552).

The spelling of 131142131223421 in words is "one hundred thirty-one trillion, one hundred forty-two billion, one hundred thirty-one million, two hundred twenty-three thousand, four hundred twenty-one".