21333201011 has 2 divisors, whose sum is σ = 21333201012. Its totient is φ = 21333201010.

The previous prime is 21333200989. The next prime is 21333201013. The reversal of 21333201011 is 11010233312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21333201011 - 2¹⁸ = 21332938867 is a prime.

Together with 21333201013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21333201013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666600505 + 10666600506.

It is an arithmetic number, because the mean of its divisors is an integer number (10666600506).

Almost surely, 2^21333201011 is an apocalyptic number.

21333201011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21333201011 is an equidigital number, since it uses as much as digits as its factorization.

21333201011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21333201011 its reverse (11010233312), we get a palindrome (32343434323).

The spelling of 21333201011 in words is "twenty-one billion, three hundred thirty-three million, two hundred one thousand, eleven".