1220215432500 has 180 divisors, whose sum is σ = 3919639563840. Its totient is φ = 319875336000.

The previous prime is 1220215432439. The next prime is 1220215432519. The reversal of 1220215432500 is 52345120221.

1220215432500 is a `hidden beast` number, since 1 + 2 + 2 + 0 + 2 + 154 + 3 + 2 + 500 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

It is a super-2 number, since 2×1220215432500² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 867909 + ... + 1787091.

Almost surely, 2^{1220215432500} is an apocalyptic number.

1220215432500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220215432500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1959819781920).

1220215432500 is an abundant number, since it is smaller than the sum of its proper divisors (2699424131340).

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

1220215432500 is a wasteful number, since it uses less digits than its factorization.

1220215432500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919272 (or 919252 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The spelling of 1220215432500 in words is "one trillion, two hundred twenty billion, two hundred fifteen million, four hundred thirty-two thousand, five hundred".