1215112133 has 2 divisors, whose sum is σ = 1215112134. Its totient is φ = 1215112132.

The previous prime is 1215112127. The next prime is 1215112141. The reversal of 1215112133 is 3312115121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1202841124 + 12271009 = 34682^2 + 3503^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215112133 - 2⁴ = 1215112117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215112123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607556066 + 607556067.

It is an arithmetic number, because the mean of its divisors is an integer number (607556067).

Almost surely, 2^1215112133 is an apocalyptic number.

It is an amenable number.

1215112133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215112133 is an equidigital number, since it uses as much as digits as its factorization.

1215112133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 20.

The square root of 1215112133 is about 34858.4585574291. The cubic root of 1215112133 is about 1067.1008170958.

Adding to 1215112133 its reverse (3312115121), we get a palindrome (4527227254).

The spelling of 1215112133 in words is "one billion, two hundred fifteen million, one hundred twelve thousand, one hundred thirty-three".