1211211242 has 8 divisors (see below), whose sum is σ = 1846600932. Its totient is φ = 595677600.

The previous prime is 1211211203. The next prime is 1211211283. The reversal of 1211211242 is 2421121121.

It can be written as a sum of positive squares in 2 ways, for example, as 770673121 + 440538121 = 27761^2 + 20989^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1211211242.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4963859 + ... + 4964102.

Almost surely, 2^1211211242 is an apocalyptic number.

1211211242 is a deficient number, since it is larger than the sum of its proper divisors (635389690).

1211211242 is an equidigital number, since it uses as much as digits as its factorization.

1211211242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9928024.

The product of its digits is 64, while the sum is 17.

The square root of 1211211242 is about 34802.4602865947. The cubic root of 1211211242 is about 1065.9576835292.

Adding to 1211211242 its reverse (2421121121), we get a palindrome (3632332363).

The spelling of 1211211242 in words is "one billion, two hundred eleven million, two hundred eleven thousand, two hundred forty-two".