21222010100111 has 2 divisors, whose sum is σ = 21222010100112. Its totient is φ = 21222010100110.

The previous prime is 21222010100099. The next prime is 21222010100173. The reversal of 21222010100111 is 11100101022212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21222010100111 - 2⁶ = 21222010100047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222010190111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611005050055 + 10611005050056.

It is an arithmetic number, because the mean of its divisors is an integer number (10611005050056).

Almost surely, 2^{21222010100111} is an apocalyptic number.

21222010100111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222010100111 is an equidigital number, since it uses as much as digits as its factorization.

21222010100111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21222010100111 its reverse (11100101022212), we get a palindrome (32322111122323).

The spelling of 21222010100111 in words is "twenty-one trillion, two hundred twenty-two billion, ten million, one hundred thousand, one hundred eleven".