1122351221 has 4 divisors (see below), whose sum is σ = 1123500972. Its totient is φ = 1121201472.

The previous prime is 1122351199. The next prime is 1122351253. The reversal of 1122351221 is 1221532211.

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 706762225 + 415588996 = 26585^2 + 20386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122351221 - 2¹⁸ = 1122089077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1122351193 and 1122351202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122311221) 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, 573410 + ... + 575363.

It is an arithmetic number, because the mean of its divisors is an integer number (280875243).

Almost surely, 2^1122351221 is an apocalyptic number.

It is an amenable number.

1122351221 is a deficient number, since it is larger than the sum of its proper divisors (1149751).

1122351221 is an equidigital number, since it uses as much as digits as its factorization.

1122351221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149750.

The product of its digits is 240, while the sum is 20.

The square root of 1122351221 is about 33501.5107271299. The cubic root of 1122351221 is about 1039.2250208383.

Adding to 1122351221 its reverse (1221532211), we get a palindrome (2343883432).

The spelling of 1122351221 in words is "one billion, one hundred twenty-two million, three hundred fifty-one thousand, two hundred twenty-one".