1215841335377 has 2 divisors, whose sum is σ = 1215841335378. Its totient is φ = 1215841335376.

The previous prime is 1215841335341. The next prime is 1215841335451. The reversal of 1215841335377 is 7735331485121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1182980347201 + 32860988176 = 1087649^2 + 181276^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215841335377 - 2¹⁸ = 1215841073233 is a prime.

It is a super-2 number, since 2×1215841335377² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1215841235377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607920667688 + 607920667689.

It is an arithmetic number, because the mean of its divisors is an integer number (607920667689).

Almost surely, 2^{1215841335377} is an apocalyptic number.

It is an amenable number.

1215841335377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215841335377 is an equidigital number, since it uses as much as digits as its factorization.

1215841335377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2116800, while the sum is 50.

The spelling of 1215841335377 in words is "one trillion, two hundred fifteen billion, eight hundred forty-one million, three hundred thirty-five thousand, three hundred seventy-seven".