1211162042 has 32 divisors (see below), whose sum is σ = 1966002192. Its totient is φ = 557466624.

The previous prime is 1211162039. The next prime is 1211162081. The reversal of 1211162042 is 2402611121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 936298801 + 274863241 = 30599^2 + 16579^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 714548 + ... + 716240.

Almost surely, 2^1211162042 is an apocalyptic number.

1211162042 is a deficient number, since it is larger than the sum of its proper divisors (754840150).

1211162042 is a wasteful number, since it uses less digits than its factorization.

1211162042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1211162042 is about 34801.7534328373. The cubic root of 1211162042 is about 1065.9432500909.

Adding to 1211162042 its reverse (2402611121), we get a palindrome (3613773163).

The spelling of 1211162042 in words is "one billion, two hundred eleven million, one hundred sixty-two thousand, forty-two".