221211020112111 has 32 divisors (see below), whose sum is σ = 342593898616320. Its totient is φ = 140804216384832.

The previous prime is 221211020112067. The next prime is 221211020112143. The reversal of 221211020112111 is 111211020112122.

It is a happy number.

221211020112111 is a `hidden beast` number, since 221 + 2 + 110 + 201 + 121 + 11 = 666.

It is not a de Polignac number, because 221211020112111 - 2¹⁴ = 221211020095727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211020112211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 325270390 + ... + 325949763.

It is an arithmetic number, because the mean of its divisors is an integer number (10706059331760).

Almost surely, 2^{221211020112111} is an apocalyptic number.

221211020112111 is a deficient number, since it is larger than the sum of its proper divisors (121382878504209).

221211020112111 is a wasteful number, since it uses less digits than its factorization.

221211020112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651220732 (or 651220726 counting only the distinct ones).

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

Adding to 221211020112111 its reverse (111211020112122), we get a palindrome (332422040224233).

The spelling of 221211020112111 in words is "two hundred twenty-one trillion, two hundred eleven billion, twenty million, one hundred twelve thousand, one hundred eleven".