1215104184361 has 2 divisors, whose sum is σ = 1215104184362. Its totient is φ = 1215104184360.

The previous prime is 1215104184337. The next prime is 1215104184367. The reversal of 1215104184361 is 1634814015121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1095097367961 + 120006816400 = 1046469^2 + 346420^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215104184361 - 2³¹ = 1212956700713 is a prime.

It is a super-2 number, since 2×1215104184361² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1215104184361.

It is not a weakly prime, because it can be changed into another prime (1215104184367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607552092180 + 607552092181.

It is an arithmetic number, because the mean of its divisors is an integer number (607552092181).

Almost surely, 2^{1215104184361} is an apocalyptic number.

It is an amenable number.

1215104184361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215104184361 is an equidigital number, since it uses as much as digits as its factorization.

1215104184361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 37.

Adding to 1215104184361 its reverse (1634814015121), we get a palindrome (2849918199482).

The spelling of 1215104184361 in words is "one trillion, two hundred fifteen billion, one hundred four million, one hundred eighty-four thousand, three hundred sixty-one".