2221121000320 has 64 divisors (see below), whose sum is σ = 5589334126800. Its totient is φ = 841687953408.

The previous prime is 2221121000311. The next prime is 2221121000321. The reversal of 2221121000320 is 230001211222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 2221121000294 and 2221121000303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221121000321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91316829 + ... + 91341148.

Almost surely, 2^{2221121000320} is an apocalyptic number.

2221121000320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221121000320 is an abundant number, since it is smaller than the sum of its proper divisors (3368213126480).

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

2221121000320 is a wasteful number, since it uses less digits than its factorization.

2221121000320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182658015 (or 182658003 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 2221121000320 its reverse (230001211222), we get a palindrome (2451122211542).

The spelling of 2221121000320 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-one million, three hundred twenty", and thus it is an aban number.