1222113545 has 4 divisors (see below), whose sum is σ = 1466536260. Its totient is φ = 977690832.

The previous prime is 1222113521. The next prime is 1222113547. The reversal of 1222113545 is 5453112221.

1222113545 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5453112221 = 263 ⋅20734267.

It can be written as a sum of positive squares in 2 ways, for example, as 152300281 + 1069813264 = 12341^2 + 32708^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222113545 - 2⁶ = 1222113481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1222113547) 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, 122211350 + ... + 122211359.

It is an arithmetic number, because the mean of its divisors is an integer number (366634065).

Almost surely, 2^1222113545 is an apocalyptic number.

It is an amenable number.

1222113545 is a deficient number, since it is larger than the sum of its proper divisors (244422715).

1222113545 is an equidigital number, since it uses as much as digits as its factorization.

1222113545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244422714.

The product of its digits is 2400, while the sum is 26.

The square root of 1222113545 is about 34958.7406094670. The cubic root of 1222113545 is about 1069.1464194301.

Adding to 1222113545 its reverse (5453112221), we get a palindrome (6675225766).

The spelling of 1222113545 in words is "one billion, two hundred twenty-two million, one hundred thirteen thousand, five hundred forty-five".