1215525121500 has 48 divisors (see below), whose sum is σ = 3539609158176. Its totient is φ = 324140032000.

The previous prime is 1215525121457. The next prime is 1215525121511. The reversal of 1215525121500 is 51215255121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405173541 + ... + 405176540.

It is an arithmetic number, because the mean of its divisors is an integer number (73741857462).

Almost surely, 2^{1215525121500} is an apocalyptic number.

1215525121500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215525121500 is an abundant number, since it is smaller than the sum of its proper divisors (2324084036676).

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

1215525121500 is a wasteful number, since it uses less digits than its factorization.

1215525121500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810350103 (or 810350091 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 30.

The spelling of 1215525121500 in words is "one trillion, two hundred fifteen billion, five hundred twenty-five million, one hundred twenty-one thousand, five hundred".