1216141144 has 8 divisors (see below), whose sum is σ = 2280264660. Its totient is φ = 608070568.

The previous prime is 1216141141. The next prime is 1216141153. The reversal of 1216141144 is 4411416121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216141141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76008814 + ... + 76008829.

Almost surely, 2^1216141144 is an apocalyptic number.

It is an amenable number.

1216141144 is a deficient number, since it is larger than the sum of its proper divisors (1064123516).

1216141144 is a wasteful number, since it uses less digits than its factorization.

1216141144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152017649 (or 152017645 counting only the distinct ones).

The product of its digits is 768, while the sum is 25.

The square root of 1216141144 is about 34873.2152804986. The cubic root of 1216141144 is about 1067.4019549176.

Adding to 1216141144 its reverse (4411416121), we get a palindrome (5627557265).

The spelling of 1216141144 in words is "one billion, two hundred sixteen million, one hundred forty-one thousand, one hundred forty-four".