1122011212221 has 32 divisors (see below), whose sum is σ = 1672794270720. Its totient is φ = 743266547712.

The previous prime is 1122011212213. The next prime is 1122011212237. The reversal of 1122011212221 is 1222121102211.

1122011212221 is a `hidden beast` number, since 1 + 1 + 220 + 11 + 212 + 221 = 666.

It is not a de Polignac number, because 1122011212221 - 2³ = 1122011212213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1122011212194 and 1122011212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122011212211) 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, 4372345 + ... + 4621841.

It is an arithmetic number, because the mean of its divisors is an integer number (52274820960).

Almost surely, 2^{1122011212221} is an apocalyptic number.

It is an amenable number.

1122011212221 is a deficient number, since it is larger than the sum of its proper divisors (550783058499).

1122011212221 is a wasteful number, since it uses less digits than its factorization.

1122011212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250562 (or 250556 counting only the distinct ones).

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

Adding to 1122011212221 its reverse (1222121102211), we get a palindrome (2344132314432).

The spelling of 1122011212221 in words is "one trillion, one hundred twenty-two billion, eleven million, two hundred twelve thousand, two hundred twenty-one".