1122200221 has 4 divisors (see below), whose sum is σ = 1122792444. Its totient is φ = 1121608000.

The previous prime is 1122200207. The next prime is 1122200239. The reversal of 1122200221 is 1220022211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 233325625 + 888874596 = 15275^2 + 29814^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122200221 - 2²¹ = 1120103069 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 (1122200201) 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, 293260 + ... + 297061.

It is an arithmetic number, because the mean of its divisors is an integer number (280698111).

Almost surely, 2^1122200221 is an apocalyptic number.

It is an amenable number.

1122200221 is a deficient number, since it is larger than the sum of its proper divisors (592223).

1122200221 is an equidigital number, since it uses as much as digits as its factorization.

1122200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592222.

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

The square root of 1122200221 is about 33499.2570216117. The cubic root of 1122200221 is about 1039.1784133198.

Adding to 1122200221 its reverse (1220022211), we get a palindrome (2342222432).

The spelling of 1122200221 in words is "one billion, one hundred twenty-two million, two hundred thousand, two hundred twenty-one".