1211444442 has 24 divisors (see below), whose sum is σ = 2826704244. Its totient is φ = 372752064.

The previous prime is 1211444441. The next prime is 1211444453. The reversal of 1211444442 is 2444441121.

It is a happy number.

1211444442 is a `hidden beast` number, since 1 + 211 + 4 + 4 + 4 + 442 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1186733601 + 24710841 = 34449^2 + 4971^2 .

It is a super-3 number, since 3×1211444442³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211444441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2588323 + ... + 2588790.

Almost surely, 2^1211444442 is an apocalyptic number.

1211444442 is an abundant number, since it is smaller than the sum of its proper divisors (1615259802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211444442 is a wasteful number, since it uses less digits than its factorization.

1211444442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5177134 (or 5177131 counting only the distinct ones).

The product of its digits is 4096, while the sum is 27.

The square root of 1211444442 is about 34805.8104631971. The cubic root of 1211444442 is about 1066.0260903634.

Adding to 1211444442 its reverse (2444441121), we get a palindrome (3655885563).

The spelling of 1211444442 in words is "one billion, two hundred eleven million, four hundred forty-four thousand, four hundred forty-two".