21331191341 has 2 divisors, whose sum is σ = 21331191342. Its totient is φ = 21331191340.

The previous prime is 21331191311. The next prime is 21331191379. The reversal of 21331191341 is 14319113312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19326838441 + 2004352900 = 139021^2 + 44770^2 .

It is a cyclic number.

It is not a de Polignac number, because 21331191341 - 2²² = 21326997037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21331191311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665595670 + 10665595671.

It is an arithmetic number, because the mean of its divisors is an integer number (10665595671).

Almost surely, 2^21331191341 is an apocalyptic number.

It is an amenable number.

21331191341 is a deficient number, since it is larger than the sum of its proper divisors (1).

21331191341 is an equidigital number, since it uses as much as digits as its factorization.

21331191341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 29.

The spelling of 21331191341 in words is "twenty-one billion, three hundred thirty-one million, one hundred ninety-one thousand, three hundred forty-one".