1122000221 has 4 divisors (see below), whose sum is σ = 1188000252. Its totient is φ = 1056000192.

The previous prime is 1122000203. The next prime is 1122000233. The reversal of 1122000221 is 1220002211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1220002211 = 211 ⋅5782001.

It can be written as a sum of positive squares in 2 ways, for example, as 630712996 + 491287225 = 25114^2 + 22165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1122000221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122000241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32999990 + ... + 33000023.

It is an arithmetic number, because the mean of its divisors is an integer number (297000063).

Almost surely, 2^1122000221 is an apocalyptic number.

It is an amenable number.

1122000221 is a deficient number, since it is larger than the sum of its proper divisors (66000031).

1122000221 is an equidigital number, since it uses as much as digits as its factorization.

1122000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66000030.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1122000221 is about 33496.2717477632. The cubic root of 1122000221 is about 1039.1166750705.

Adding to 1122000221 its reverse (1220002211), we get a palindrome (2342002432).

The spelling of 1122000221 in words is "one billion, one hundred twenty-two million, two hundred twenty-one", and thus it is an aban number.