1215143402401 has 8 divisors (see below), whose sum is σ = 1284935275008. Its totient is φ = 1147263636000.

The previous prime is 1215143402353. The next prime is 1215143402413. The reversal of 1215143402401 is 1042043415121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1215143402401 - 2⁹ = 1215143401889 is a prime.

It is a super-2 number, since 2×1215143402401² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1215143402401.

It is not an unprimeable number, because it can be changed into a prime (1215143402491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478025245 + ... + 478027786.

It is an arithmetic number, because the mean of its divisors is an integer number (160616909376).

Almost surely, 2^{1215143402401} is an apocalyptic number.

It is an amenable number.

1215143402401 is a deficient number, since it is larger than the sum of its proper divisors (69791872607).

1215143402401 is an equidigital number, since it uses as much as digits as its factorization.

1215143402401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956053103.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 1215143402401 its reverse (1042043415121), we get a palindrome (2257186817522).

The spelling of 1215143402401 in words is "one trillion, two hundred fifteen billion, one hundred forty-three million, four hundred two thousand, four hundred one".