1122212110221 has 12 divisors (see below), whose sum is σ = 1664783130972. Its totient is φ = 727921368576.

The previous prime is 1122212110169. The next prime is 1122212110289. The reversal of 1122212110221 is 1220112122211.

1122212110221 is a `hidden beast` number, since 1 + 12 + 221 + 211 + 0 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 975531536100 + 146680574121 = 987690^2 + 382989^2 .

It is not a de Polignac number, because 1122212110221 - 2¹⁷ = 1122211979149 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1122212110194 and 1122212110203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122212110291) 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, 1685002836 + ... + 1685003501.

It is an arithmetic number, because the mean of its divisors is an integer number (138731927581).

Almost surely, 2^{1122212110221} is an apocalyptic number.

It is an amenable number.

1122212110221 is a deficient number, since it is larger than the sum of its proper divisors (542571020751).

1122212110221 is a wasteful number, since it uses less digits than its factorization.

1122212110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3370006380 (or 3370006377 counting only the distinct ones).

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

Adding to 1122212110221 its reverse (1220112122211), we get a palindrome (2342324232432).

The spelling of 1122212110221 in words is "one trillion, one hundred twenty-two billion, two hundred twelve million, one hundred ten thousand, two hundred twenty-one".