1215382154412 has 12 divisors (see below), whose sum is σ = 2835891693656. Its totient is φ = 405127384800.

The previous prime is 1215382154411. The next prime is 1215382154443. The reversal of 1215382154412 is 2144512835121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1215382154412² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1215382154411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50640923089 + ... + 50640923112.

Almost surely, 2^{1215382154412} is an apocalyptic number.

1215382154412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1215382154412 is an abundant number, since it is smaller than the sum of its proper divisors (1620509539244).

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

1215382154412 is a wasteful number, since it uses less digits than its factorization.

1215382154412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101281846208 (or 101281846206 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

Adding to 1215382154412 its reverse (2144512835121), we get a palindrome (3359894989533).

The spelling of 1215382154412 in words is "one trillion, two hundred fifteen billion, three hundred eighty-two million, one hundred fifty-four thousand, four hundred twelve".