22220121212111 has 2 divisors, whose sum is σ = 22220121212112. Its totient is φ = 22220121212110.

The previous prime is 22220121211987. The next prime is 22220121212117. The reversal of 22220121212111 is 11121212102222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22220121212111 - 2¹⁸ = 22220120949967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22220121212117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110060606055 + 11110060606056.

It is an arithmetic number, because the mean of its divisors is an integer number (11110060606056).

Almost surely, 2^{22220121212111} is an apocalyptic number.

22220121212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

22220121212111 is an equidigital number, since it uses as much as digits as its factorization.

22220121212111 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 22220121212111 its reverse (11121212102222), we get a palindrome (33341333314333).

The spelling of 22220121212111 in words is "twenty-two trillion, two hundred twenty billion, one hundred twenty-one million, two hundred twelve thousand, one hundred eleven".