2215120520000 has 70 divisors (see below), whose sum is σ = 5492779074618. Its totient is φ = 886048192000.

The previous prime is 2215120519999. The next prime is 2215120520027. The reversal of 2215120520000 is 250215122.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 521145385216 + 1693975134784 = 721904^2 + 1301528^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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 9 ways as a sum of consecutive naturals, for example, 27649007 + ... + 27729006.

Almost surely, 2^{2215120520000} is an apocalyptic number.

2215120520000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2215120520000 is an abundant number, since it is smaller than the sum of its proper divisors (3277658554618).

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

2215120520000 is an frugal number, since it uses more digits than its factorization.

2215120520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55378045 (or 55378020 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 2215120520000 its reverse (250215122), we get a palindrome (2215370735122).

The spelling of 2215120520000 in words is "two trillion, two hundred fifteen billion, one hundred twenty million, five hundred twenty thousand".