1121222345 has 4 divisors (see below), whose sum is σ = 1345466820. Its totient is φ = 896977872.

The previous prime is 1121222341. The next prime is 1121222363. The reversal of 1121222345 is 5432221211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5432221211 = 821 ⋅6616591.

It can be written as a sum of positive squares in 2 ways, for example, as 735060544 + 386161801 = 27112^2 + 19651^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121222345 - 2² = 1121222341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121222345.

It is not an unprimeable number, because it can be changed into a prime (1121222341) 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, 112122230 + ... + 112122239.

It is an arithmetic number, because the mean of its divisors is an integer number (336366705).

Almost surely, 2^1121222345 is an apocalyptic number.

It is an amenable number.

1121222345 is a deficient number, since it is larger than the sum of its proper divisors (224244475).

1121222345 is an equidigital number, since it uses as much as digits as its factorization.

1121222345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224244474.

The product of its digits is 960, while the sum is 23.

The square root of 1121222345 is about 33484.6583527442. The cubic root of 1121222345 is about 1038.8764817750.

Adding to 1121222345 its reverse (5432221211), we get a palindrome (6553443556).

The spelling of 1121222345 in words is "one billion, one hundred twenty-one million, two hundred twenty-two thousand, three hundred forty-five".