21223301111 has 2 divisors, whose sum is σ = 21223301112. Its totient is φ = 21223301110.

The previous prime is 21223301087. The next prime is 21223301119. The reversal of 21223301111 is 11110332212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21223301111 - 2²⁶ = 21156192247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21223301111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21223301119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611650555 + 10611650556.

It is an arithmetic number, because the mean of its divisors is an integer number (10611650556).

Almost surely, 2^21223301111 is an apocalyptic number.

21223301111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223301111 is an equidigital number, since it uses as much as digits as its factorization.

21223301111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21223301111 its reverse (11110332212), we get a palindrome (32333633323).

The spelling of 21223301111 in words is "twenty-one billion, two hundred twenty-three million, three hundred one thousand, one hundred eleven".