21133242311 has 2 divisors, whose sum is σ = 21133242312. Its totient is φ = 21133242310.

The previous prime is 21133242301. The next prime is 21133242353. The reversal of 21133242311 is 11324233112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21133242311 is a prime.

It is a super-2 number, since 2×21133242311² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21133242301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566621155 + 10566621156.

It is an arithmetic number, because the mean of its divisors is an integer number (10566621156).

Almost surely, 2^21133242311 is an apocalyptic number.

21133242311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21133242311 is an equidigital number, since it uses as much as digits as its factorization.

21133242311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

Adding to 21133242311 its reverse (11324233112), we get a palindrome (32457475423).

The spelling of 21133242311 in words is "twenty-one billion, one hundred thirty-three million, two hundred forty-two thousand, three hundred eleven".