1215401333412 has 24 divisors (see below), whose sum is σ = 3241070222656. Its totient is φ = 347257523808.

The previous prime is 1215401333381. The next prime is 1215401333413. The reversal of 1215401333412 is 2143331045121.

It is a self number, because there is not a number n which added to its sum of digits gives 1215401333412.

It is not an unprimeable number, because it can be changed into a prime (1215401333413) 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 in 7 ways as a sum of consecutive naturals, for example, 7234531663 + ... + 7234531830.

Almost surely, 2^{1215401333412} is an apocalyptic number.

1215401333412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1215401333412 is an abundant number, since it is smaller than the sum of its proper divisors (2025668889244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215401333412 is a wasteful number, since it uses less digits than its factorization.

1215401333412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14469063507 (or 14469063505 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 1215401333412 its reverse (2143331045121), we get a palindrome (3358732378533).

The spelling of 1215401333412 in words is "one trillion, two hundred fifteen billion, four hundred one million, three hundred thirty-three thousand, four hundred twelve".