1110212221221 has 12 divisors (see below), whose sum is σ = 1603801482400. Its totient is φ = 740066892840.

The previous prime is 1110212221213. The next prime is 1110212221241. The reversal of 1110212221221 is 1221222120111.

1110212221221 is a `hidden beast` number, since 1 + 1 + 10 + 212 + 221 + 221 = 666.

It is not a de Polignac number, because 1110212221221 - 2³ = 1110212221213 is a prime.

It is a super-2 number, since 2×1110212221221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1110212221194 and 1110212221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1110212221241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6121321 + ... + 6300078.

Almost surely, 2^{1110212221221} is an apocalyptic number.

It is an amenable number.

1110212221221 is a deficient number, since it is larger than the sum of its proper divisors (493589261179).

1110212221221 is a wasteful number, since it uses less digits than its factorization.

1110212221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12431336 (or 12431333 counting only the distinct ones).

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

Adding to 1110212221221 its reverse (1221222120111), we get a palindrome (2331434341332).

The spelling of 1110212221221 in words is "one trillion, one hundred ten billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty-one".