21131022143191 has 2 divisors, whose sum is σ = 21131022143192. Its totient is φ = 21131022143190.

The previous prime is 21131022143171. The next prime is 21131022143213. The reversal of 21131022143191 is 19134122013112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21131022143191 - 2²¹ = 21131020046039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21131022143111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565511071595 + 10565511071596.

It is an arithmetic number, because the mean of its divisors is an integer number (10565511071596).

Almost surely, 2^{21131022143191} is an apocalyptic number.

21131022143191 is a deficient number, since it is larger than the sum of its proper divisors (1).

21131022143191 is an equidigital number, since it uses as much as digits as its factorization.

21131022143191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 21131022143191 in words is "twenty-one trillion, one hundred thirty-one billion, twenty-two million, one hundred forty-three thousand, one hundred ninety-one".