1122513221 has 2 divisors, whose sum is σ = 1122513222. Its totient is φ = 1122513220.

The previous prime is 1122513187. The next prime is 1122513233. The reversal of 1122513221 is 1223152211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 899160196 + 223353025 = 29986^2 + 14945^2 .

It is an emirp because it is prime and its reverse (1223152211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1122513221 - 2³⁰ = 48771397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1122513193 and 1122513202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1122113221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561256610 + 561256611.

It is an arithmetic number, because the mean of its divisors is an integer number (561256611).

Almost surely, 2^1122513221 is an apocalyptic number.

It is an amenable number.

1122513221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122513221 is an equidigital number, since it uses as much as digits as its factorization.

1122513221 is an evil number, because the sum of its binary digits is even.

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

The square root of 1122513221 is about 33503.9284413037. The cubic root of 1122513221 is about 1039.2750189586.

Adding to 1122513221 its reverse (1223152211), we get a palindrome (2345665432).

The spelling of 1122513221 in words is "one billion, one hundred twenty-two million, five hundred thirteen thousand, two hundred twenty-one".