21012341611 has 2 divisors, whose sum is σ = 21012341612. Its totient is φ = 21012341610.

The previous prime is 21012341569. The next prime is 21012341627. The reversal of 21012341611 is 11614321012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21012341611 - 2²⁹ = 20475470699 is a prime.

It is not a weakly prime, because it can be changed into another prime (21012341641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506170805 + 10506170806.

It is an arithmetic number, because the mean of its divisors is an integer number (10506170806).

Almost surely, 2^21012341611 is an apocalyptic number.

21012341611 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012341611 is an equidigital number, since it uses as much as digits as its factorization.

21012341611 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 22.

Adding to 21012341611 its reverse (11614321012), we get a palindrome (32626662623).

The spelling of 21012341611 in words is "twenty-one billion, twelve million, three hundred forty-one thousand, six hundred eleven".