1216141273 has 2 divisors, whose sum is σ = 1216141274. Its totient is φ = 1216141272.

The previous prime is 1216141259. The next prime is 1216141327. The reversal of 1216141273 is 3721416121.

Together with next prime (1216141327) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 829900864 + 386240409 = 28808^2 + 19653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216141273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1216141373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608070636 + 608070637.

It is an arithmetic number, because the mean of its divisors is an integer number (608070637).

Almost surely, 2^1216141273 is an apocalyptic number.

It is an amenable number.

1216141273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216141273 is an equidigital number, since it uses as much as digits as its factorization.

1216141273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 1216141273 is about 34873.2171300556. The cubic root of 1216141273 is about 1067.4019926586.

Adding to 1216141273 its reverse (3721416121), we get a palindrome (4937557394).

The spelling of 1216141273 in words is "one billion, two hundred sixteen million, one hundred forty-one thousand, two hundred seventy-three".