221111200212111 has 48 divisors (see below), whose sum is σ = 359676744440832. Its totient is φ = 129676842979200.

The previous prime is 221111200212103. The next prime is 221111200212127. The reversal of 221111200212111 is 111212002111122.

It is a happy number.

221111200212111 is a `hidden beast` number, since 221 + 1 + 1 + 120 + 0 + 212 + 111 = 666.

221111200212111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221111200212111 - 2³ = 221111200212103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111200292111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53981356 + ... + 57932798.

It is an arithmetic number, because the mean of its divisors is an integer number (7493265509184).

Almost surely, 2^{221111200212111} is an apocalyptic number.

221111200212111 is a deficient number, since it is larger than the sum of its proper divisors (138565544228721).

221111200212111 is a wasteful number, since it uses less digits than its factorization.

221111200212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3969724 (or 3969721 counting only the distinct ones).

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

Adding to 221111200212111 its reverse (111212002111122), we get a palindrome (332323202323233).

The spelling of 221111200212111 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred million, two hundred twelve thousand, one hundred eleven".