111201210221121 has 32 divisors (see below), whose sum is σ = 165024855680000. Its totient is φ = 74007111421440.

The previous prime is 111201210221027. The next prime is 111201210221131. The reversal of 111201210221121 is 121122012102111.

It is a happy number.

111201210221121 is a `hidden beast` number, since 1 + 11 + 201 + 210 + 221 + 1 + 21 = 666.

It is not a de Polignac number, because 111201210221121 - 2¹⁵ = 111201210188353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111201210221094 and 111201210221103.

It is not an unprimeable number, because it can be changed into a prime (111201210221131) 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, 256451505 + ... + 256884753.

It is an arithmetic number, because the mean of its divisors is an integer number (5157026740000).

Almost surely, 2^{111201210221121} is an apocalyptic number.

It is an amenable number.

111201210221121 is a deficient number, since it is larger than the sum of its proper divisors (53823645458879).

111201210221121 is a wasteful number, since it uses less digits than its factorization.

111201210221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449526 (or 449520 counting only the distinct ones).

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

Adding to 111201210221121 its reverse (121122012102111), we get a palindrome (232323222323232).

The spelling of 111201210221121 in words is "one hundred eleven trillion, two hundred one billion, two hundred ten million, two hundred twenty-one thousand, one hundred twenty-one".