1122211021 has 4 divisors (see below), whose sum is σ = 1188223452. Its totient is φ = 1056198592.

The previous prime is 1122211007. The next prime is 1122211043. The reversal of 1122211021 is 1201122211.

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 961682121 + 160528900 = 31011^2 + 12670^2 .

It is a cyclic number.

It is not a de Polignac number, because 1122211021 - 2⁷ = 1122210893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1122210992 and 1122211010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122211081) 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, 33006190 + ... + 33006223.

It is an arithmetic number, because the mean of its divisors is an integer number (297055863).

Almost surely, 2^1122211021 is an apocalyptic number.

It is an amenable number.

1122211021 is a deficient number, since it is larger than the sum of its proper divisors (66012431).

1122211021 is an equidigital number, since it uses as much as digits as its factorization.

1122211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66012430.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1122211021 is about 33499.4182188288. The cubic root of 1122211021 is about 1039.1817469765.

Adding to 1122211021 its reverse (1201122211), we get a palindrome (2323333232).

The spelling of 1122211021 in words is "one billion, one hundred twenty-two million, two hundred eleven thousand, twenty-one".