1122020221 has 4 divisors (see below), whose sum is σ = 1282308832. Its totient is φ = 961731612.

The previous prime is 1122020203. The next prime is 1122020239. The reversal of 1122020221 is 1220202211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1122020203) and next prime (1122020239).

It is a cyclic number.

It is not a de Polignac number, because 1122020221 - 2²¹ = 1119923069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122020021) 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, 80144295 + ... + 80144308.

It is an arithmetic number, because the mean of its divisors is an integer number (320577208).

Almost surely, 2^1122020221 is an apocalyptic number.

It is an amenable number.

1122020221 is a deficient number, since it is larger than the sum of its proper divisors (160288611).

1122020221 is an equidigital number, since it uses as much as digits as its factorization.

1122020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160288610.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1122020221 is about 33496.5702871204. The cubic root of 1122020221 is about 1039.1228492256.

Adding to 1122020221 its reverse (1220202211), we get a palindrome (2342222432).

The spelling of 1122020221 in words is "one billion, one hundred twenty-two million, twenty thousand, two hundred twenty-one".