1122561213 has 4 divisors (see below), whose sum is σ = 1496748288. Its totient is φ = 748374140.

The previous prime is 1122561179. The next prime is 1122561217. The reversal of 1122561213 is 3121652211.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3121652211 = 3 ⋅1040550737.

It is a cyclic number.

It is not a de Polignac number, because 1122561213 - 2¹³ = 1122553021 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122561217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187093533 + ... + 187093538.

It is an arithmetic number, because the mean of its divisors is an integer number (374187072).

Almost surely, 2^1122561213 is an apocalyptic number.

It is an amenable number.

1122561213 is a deficient number, since it is larger than the sum of its proper divisors (374187075).

1122561213 is an equidigital number, since it uses as much as digits as its factorization.

1122561213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374187074.

The product of its digits is 720, while the sum is 24.

The square root of 1122561213 is about 33504.6446481678. The cubic root of 1122561213 is about 1039.2898298238.

The spelling of 1122561213 in words is "one billion, one hundred twenty-two million, five hundred sixty-one thousand, two hundred thirteen".