1122112210221 has 12 divisors (see below), whose sum is σ = 1664634930972. Its totient is φ = 727856568576.

The previous prime is 1122112210189. The next prime is 1122112210229. The reversal of 1122112210221 is 1220122112211.

1122112210221 is a `hidden beast` number, since 1 + 1 + 221 + 1 + 221 + 0 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 760490387721 + 361621822500 = 872061^2 + 601350^2 .

It is not a de Polignac number, because 1122112210221 - 2⁵ = 1122112210189 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1122112210194 and 1122112210203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122112210229) 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, 1684852836 + ... + 1684853501.

It is an arithmetic number, because the mean of its divisors is an integer number (138719577581).

Almost surely, 2^{1122112210221} is an apocalyptic number.

It is an amenable number.

1122112210221 is a deficient number, since it is larger than the sum of its proper divisors (542522720751).

1122112210221 is a wasteful number, since it uses less digits than its factorization.

1122112210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3369706380 (or 3369706377 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1122112210221 its reverse (1220122112211), we get a palindrome (2342234322432).

The spelling of 1122112210221 in words is "one trillion, one hundred twenty-two billion, one hundred twelve million, two hundred ten thousand, two hundred twenty-one".