1215552123012 has 12 divisors (see below), whose sum is σ = 2836288287056. Its totient is φ = 405184041000.

The previous prime is 1215552123011. The next prime is 1215552123029. The reversal of 1215552123012 is 2103212555121.

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

It is not an unprimeable number, because it can be changed into a prime (1215552123011) 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, 50648005114 + ... + 50648005137.

Almost surely, 2^{1215552123012} is an apocalyptic number.

1215552123012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1215552123012 is an abundant number, since it is smaller than the sum of its proper divisors (1620736164044).

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

1215552123012 is a wasteful number, since it uses less digits than its factorization.

1215552123012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101296010258 (or 101296010256 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 1215552123012 its reverse (2103212555121), we get a palindrome (3318764678133).

The spelling of 1215552123012 in words is "one trillion, two hundred fifteen billion, five hundred fifty-two million, one hundred twenty-three thousand, twelve".