211222001011111 has 4 divisors (see below), whose sum is σ = 211240757971224. Its totient is φ = 211203244051000.

The previous prime is 211222001011097. The next prime is 211222001011121. The reversal of 211222001011111 is 111110100222112.

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 211222001011111 - 2⁴⁷ = 70484512655783 is a prime.

It is a super-2 number, since 2×211222001011111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211222001011121) 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 3 ways as a sum of consecutive naturals, for example, 9378463165 + ... + 9378485686.

It is an arithmetic number, because the mean of its divisors is an integer number (52810189492806).

Almost surely, 2^{211222001011111} is an apocalyptic number.

211222001011111 is a deficient number, since it is larger than the sum of its proper divisors (18756960113).

211222001011111 is a wasteful number, since it uses less digits than its factorization.

211222001011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18756960112.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 211222001011111 its reverse (111110100222112), we get a palindrome (322332101233223).

The spelling of 211222001011111 in words is "two hundred eleven trillion, two hundred twenty-two billion, one million, eleven thousand, one hundred eleven".