1215551323341 has 120 divisors (see below), whose sum is σ = 1995918084864. Its totient is φ = 736314727680.

The previous prime is 1215551323321. The next prime is 1215551323367. The reversal of 1215551323341 is 1433231555121.

It is a happy number.

1215551323341 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 551 + 32 + 33 + 41 = 666.

It is not a de Polignac number, because 1215551323341 - 2¹¹ = 1215551321293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1215551323296 and 1215551323305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215551323321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 102425290 + ... + 102437156.

Almost surely, 2^{1215551323341} is an apocalyptic number.

It is an amenable number.

1215551323341 is a deficient number, since it is larger than the sum of its proper divisors (780366761523).

1215551323341 is a wasteful number, since it uses less digits than its factorization.

1215551323341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12061 (or 12033 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

Adding to 1215551323341 its reverse (1433231555121), we get a palindrome (2648782878462).

The spelling of 1215551323341 in words is "one trillion, two hundred fifteen billion, five hundred fifty-one million, three hundred twenty-three thousand, three hundred forty-one".