21133013311 has 2 divisors, whose sum is σ = 21133013312. Its totient is φ = 21133013310.

The previous prime is 21133013287. The next prime is 21133013323. The reversal of 21133013311 is 11331033112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21133013311 - 2²⁷ = 20998795583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21133013411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566506655 + 10566506656.

It is an arithmetic number, because the mean of its divisors is an integer number (10566506656).

Almost surely, 2^21133013311 is an apocalyptic number.

21133013311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21133013311 is an equidigital number, since it uses as much as digits as its factorization.

21133013311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 21133013311 its reverse (11331033112), we get a palindrome (32464046423).

The spelling of 21133013311 in words is "twenty-one billion, one hundred thirty-three million, thirteen thousand, three hundred eleven".