22011220202111 has 4 divisors (see below), whose sum is σ = 25155680230992. Its totient is φ = 18866760173232.

The previous prime is 22011220202057. The next prime is 22011220202119. The reversal of 22011220202111 is 11120202211022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22011220202111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22011220202111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011220202119) 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, 1572230014430 + ... + 1572230014443.

It is an arithmetic number, because the mean of its divisors is an integer number (6288920057748).

Almost surely, 2^{22011220202111} is an apocalyptic number.

22011220202111 is a deficient number, since it is larger than the sum of its proper divisors (3144460028881).

22011220202111 is an equidigital number, since it uses as much as digits as its factorization.

22011220202111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144460028880.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22011220202111 its reverse (11120202211022), we get a palindrome (33131422413133).

The spelling of 22011220202111 in words is "twenty-two trillion, eleven billion, two hundred twenty million, two hundred two thousand, one hundred eleven".