1216143141 has 16 divisors (see below), whose sum is σ = 1672042176. Its totient is φ = 785872256.

The previous prime is 1216143139. The next prime is 1216143191. The reversal of 1216143141 is 1413416121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1216143141 - 2¹ = 1216143139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216143191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32880 + ... + 59273.

It is an arithmetic number, because the mean of its divisors is an integer number (104502636).

Almost surely, 2^1216143141 is an apocalyptic number.

It is an amenable number.

1216143141 is a deficient number, since it is larger than the sum of its proper divisors (455899035).

1216143141 is an equidigital number, since it uses as much as digits as its factorization.

1216143141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92292.

The product of its digits is 576, while the sum is 24.

The square root of 1216143141 is about 34873.2439127765. The cubic root of 1216143141 is about 1067.4025391701.

Adding to 1216143141 its reverse (1413416121), we get a palindrome (2629559262).

The spelling of 1216143141 in words is "one billion, two hundred sixteen million, one hundred forty-three thousand, one hundred forty-one".