22001212111 has 2 divisors, whose sum is σ = 22001212112. Its totient is φ = 22001212110.

The previous prime is 22001212109. The next prime is 22001212187. The reversal of 22001212111 is 11121210022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22001212111 - 2¹ = 22001212109 is a prime.

Together with 22001212109, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 22001212091 and 22001212100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22001210111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000606055 + 11000606056.

It is an arithmetic number, because the mean of its divisors is an integer number (11000606056).

Almost surely, 2^22001212111 is an apocalyptic number.

22001212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

22001212111 is an equidigital number, since it uses as much as digits as its factorization.

22001212111 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 13.

Adding to 22001212111 its reverse (11121210022), we get a palindrome (33122422133).

The spelling of 22001212111 in words is "twenty-two billion, one million, two hundred twelve thousand, one hundred eleven".