1222541311 has 4 divisors (see below), whose sum is σ = 1226472624. Its totient is φ = 1218610000.

The previous prime is 1222541273. The next prime is 1222541317. The reversal of 1222541311 is 1131452221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1222541311 - 2¹³ = 1222533119 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222541317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1965190 + ... + 1965811.

It is an arithmetic number, because the mean of its divisors is an integer number (306618156).

Almost surely, 2^1222541311 is an apocalyptic number.

1222541311 is a deficient number, since it is larger than the sum of its proper divisors (3931313).

1222541311 is an equidigital number, since it uses as much as digits as its factorization.

1222541311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3931312.

The product of its digits is 480, while the sum is 22.

The square root of 1222541311 is about 34964.8582293708. The cubic root of 1222541311 is about 1069.2711462853.

Adding to 1222541311 its reverse (1131452221), we get a palindrome (2353993532).

The spelling of 1222541311 in words is "one billion, two hundred twenty-two million, five hundred forty-one thousand, three hundred eleven".