212221001111 has 12 divisors (see below), whose sum is σ = 246879129600. Its totient is φ = 181896492960.

The previous prime is 212221001101. The next prime is 212221001119. The reversal of 212221001111 is 111100122212.

It is not a de Polignac number, because 212221001111 - 2¹⁰ = 212221000087 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 (212221001119) 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 11 ways as a sum of consecutive naturals, for example, 1431146 + ... + 1572456.

It is an arithmetic number, because the mean of its divisors is an integer number (20573260800).

Almost surely, 2^212221001111 is an apocalyptic number.

212221001111 is a deficient number, since it is larger than the sum of its proper divisors (34658128489).

212221001111 is a wasteful number, since it uses less digits than its factorization.

212221001111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171974 (or 171967 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212221001111 its reverse (111100122212), we get a palindrome (323321123323).

The spelling of 212221001111 in words is "two hundred twelve billion, two hundred twenty-one million, one thousand, one hundred eleven".