1215324312201 has 128 divisors (see below), whose sum is σ = 1963240980480. Its totient is φ = 740797358400.

The previous prime is 1215324312199. The next prime is 1215324312211. The reversal of 1215324312201 is 1022134235121.

It is a happy number.

1215324312201 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 3 + 2 + 431 + 220 + 1 = 666.

It is not a de Polignac number, because 1215324312201 - 2¹ = 1215324312199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1215324312211) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1370150980 + ... + 1370151866.

It is an arithmetic number, because the mean of its divisors is an integer number (15337820160).

Almost surely, 2^{1215324312201} is an apocalyptic number.

It is an amenable number.

1215324312201 is a deficient number, since it is larger than the sum of its proper divisors (747916668279).

1215324312201 is a wasteful number, since it uses less digits than its factorization.

1215324312201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744 (or 1738 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 1215324312201 its reverse (1022134235121), we get a palindrome (2237458547322).

The spelling of 1215324312201 in words is "one trillion, two hundred fifteen billion, three hundred twenty-four million, three hundred twelve thousand, two hundred one".