212221102011111 has 12 divisors (see below), whose sum is σ = 307587808834488. Its totient is φ = 140997865270704.

The previous prime is 212221102011101. The next prime is 212221102011131. The reversal of 212221102011111 is 111110201122212.

It is a happy number.

212221102011111 is a `hidden beast` number, since 21 + 222 + 110 + 201 + 1 + 111 = 666.

It is not a de Polignac number, because 212221102011111 - 2¹⁸ = 212221101748967 is a prime.

It is a super-2 number, since 2×212221102011111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221102011101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40239114165 + ... + 40239119438.

It is an arithmetic number, because the mean of its divisors is an integer number (25632317402874).

Almost surely, 2^{212221102011111} is an apocalyptic number.

212221102011111 is a deficient number, since it is larger than the sum of its proper divisors (95366706823377).

212221102011111 is a wasteful number, since it uses less digits than its factorization.

212221102011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80478233902 (or 80478233899 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 212221102011111 its reverse (111110201122212), we get a palindrome (323331303133323).

The spelling of 212221102011111 in words is "two hundred twelve trillion, two hundred twenty-one billion, one hundred two million, eleven thousand, one hundred eleven".