1215405221232 has 20 divisors (see below), whose sum is σ = 3139796821640. Its totient is φ = 405135073728.

The previous prime is 1215405221183. The next prime is 1215405221257. The reversal of 1215405221232 is 2321225045121.

It is a self number, because there is not a number n which added to its sum of digits gives 1215405221232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12660471007 + ... + 12660471102.

It is an arithmetic number, because the mean of its divisors is an integer number (156989841082).

Almost surely, 2^{1215405221232} is an apocalyptic number.

1215405221232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1215405221232 is an abundant number, since it is smaller than the sum of its proper divisors (1924391600408).

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

1215405221232 is a wasteful number, since it uses less digits than its factorization.

1215405221232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25320942120 (or 25320942114 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 1215405221232 in words is "one trillion, two hundred fifteen billion, four hundred five million, two hundred twenty-one thousand, two hundred thirty-two".