21222022211111 has 2 divisors, whose sum is σ = 21222022211112. Its totient is φ = 21222022211110.

The previous prime is 21222022211083. The next prime is 21222022211141. The reversal of 21222022211111 is 11111222022212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21222022211111 - 2²² = 21222018016807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222022211141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611011105555 + 10611011105556.

It is an arithmetic number, because the mean of its divisors is an integer number (10611011105556).

Almost surely, 2^{21222022211111} is an apocalyptic number.

21222022211111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222022211111 is an equidigital number, since it uses as much as digits as its factorization.

21222022211111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21222022211111 its reverse (11111222022212), we get a palindrome (32333244233323).

The spelling of 21222022211111 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-two million, two hundred eleven thousand, one hundred eleven".