2221121099968 has 56 divisors (see below), whose sum is σ = 4501847232000. Its totient is φ = 1086802983168.

The previous prime is 2221121099959. The next prime is 2221121099969. The reversal of 2221121099968 is 8699901211222.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2221121099969) 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, 28473883 + ... + 28551781.

Almost surely, 2^{2221121099968} is an apocalyptic number.

It is an amenable number.

2221121099968 is an abundant number, since it is smaller than the sum of its proper divisors (2280726132032).

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

2221121099968 is an equidigital number, since it uses as much as digits as its factorization.

2221121099968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87437 (or 87427 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 52.

The spelling of 2221121099968 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-one million, ninety-nine thousand, nine hundred sixty-eight".