21131022143111 has 2 divisors, whose sum is σ = 21131022143112. Its totient is φ = 21131022143110.

The previous prime is 21131022143107. The next prime is 21131022143131. The reversal of 21131022143111 is 11134122013112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21131022143111 - 2² = 21131022143107 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21131022143131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565511071555 + 10565511071556.

It is an arithmetic number, because the mean of its divisors is an integer number (10565511071556).

Almost surely, 2^{21131022143111} is an apocalyptic number.

21131022143111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21131022143111 is an equidigital number, since it uses as much as digits as its factorization.

21131022143111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 21131022143111 its reverse (11134122013112), we get a palindrome (32265144156223).

The spelling of 21131022143111 in words is "twenty-one trillion, one hundred thirty-one billion, twenty-two million, one hundred forty-three thousand, one hundred eleven".