22211212111111 has 4 divisors (see below), whose sum is σ = 22217319129352. Its totient is φ = 22205105092872.

The previous prime is 22211212111103. The next prime is 22211212111133. The reversal of 22211212111111 is 11111121211222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22211212111111 - 2³ = 22211212111103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211212118111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3053503665 + ... + 3053510938.

It is an arithmetic number, because the mean of its divisors is an integer number (5554329782338).

Almost surely, 2^{22211212111111} is an apocalyptic number.

22211212111111 is a deficient number, since it is larger than the sum of its proper divisors (6107018241).

22211212111111 is an equidigital number, since it uses as much as digits as its factorization.

22211212111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6107018240.

The product of its digits is 32, while the sum is 19.

Adding to 22211212111111 its reverse (11111121211222), we get a palindrome (33322333322333).

The spelling of 22211212111111 in words is "twenty-two trillion, two hundred eleven billion, two hundred twelve million, one hundred eleven thousand, one hundred eleven".