2221220120028 has 48 divisors (see below), whose sum is σ = 6378888552960. Its totient is φ = 585816295104.

The previous prime is 2221220120011. The next prime is 2221220120039. The reversal of 2221220120028 is 8200210221222.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 1017041088 + ... + 1017043271.

It is an arithmetic number, because the mean of its divisors is an integer number (132893511520).

Almost surely, 2^{2221220120028} is an apocalyptic number.

2221220120028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2221220120028 is an abundant number, since it is smaller than the sum of its proper divisors (4157668432932).

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

2221220120028 is a wasteful number, since it uses less digits than its factorization.

2221220120028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034084386 (or 2034084384 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

The spelling of 2221220120028 in words is "two trillion, two hundred twenty-one billion, two hundred twenty million, one hundred twenty thousand, twenty-eight".