131401222420421 has 2 divisors, whose sum is σ = 131401222420422. Its totient is φ = 131401222420420.

The previous prime is 131401222420357. The next prime is 131401222420439. The reversal of 131401222420421 is 124024222104131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85615510708225 + 45785711712196 = 9252865^2 + 6766514^2 .

It is an emirp because it is prime and its reverse (124024222104131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131401222420421 - 2⁶ = 131401222420357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131401222420921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65700611210210 + 65700611210211.

It is an arithmetic number, because the mean of its divisors is an integer number (65700611210211).

Almost surely, 2^{131401222420421} is an apocalyptic number.

It is an amenable number.

131401222420421 is a deficient number, since it is larger than the sum of its proper divisors (1).

131401222420421 is an equidigital number, since it uses as much as digits as its factorization.

131401222420421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 131401222420421 its reverse (124024222104131), we get a palindrome (255425444524552).

The spelling of 131401222420421 in words is "one hundred thirty-one trillion, four hundred one billion, two hundred twenty-two million, four hundred twenty thousand, four hundred twenty-one".