22011121111 has 16 divisors (see below), whose sum is σ = 25918235968. Its totient is φ = 18303148800.

The previous prime is 22011121073. The next prime is 22011121129. The reversal of 22011121111 is 11112111022.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22011121111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22011121091 and 22011121100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011121211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321900 + ... + 384241.

It is an arithmetic number, because the mean of its divisors is an integer number (1619889748).

Almost surely, 2^22011121111 is an apocalyptic number.

22011121111 is a deficient number, since it is larger than the sum of its proper divisors (3907114857).

22011121111 is an equidigital number, since it uses as much as digits as its factorization.

22011121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706282.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 22011121111 its reverse (11112111022), we get a palindrome (33123232133).

The spelling of 22011121111 in words is "twenty-two billion, eleven million, one hundred twenty-one thousand, one hundred eleven".