1220225505520 has 40 divisors (see below), whose sum is σ = 3242313487584. Its totient is φ = 418363030272.

The previous prime is 1220225505497. The next prime is 1220225505533. The reversal of 1220225505520 is 255055220221.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1089486499 + ... + 1089487618.

Almost surely, 2^{1220225505520} is an apocalyptic number.

1220225505520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220225505520 is an abundant number, since it is smaller than the sum of its proper divisors (2022087982064).

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

1220225505520 is a wasteful number, since it uses less digits than its factorization.

1220225505520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2178974137 (or 2178974131 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 31.

The spelling of 1220225505520 in words is "one trillion, two hundred twenty billion, two hundred twenty-five million, five hundred five thousand, five hundred twenty".