221020001220000 has 120 divisors (see below), whose sum is σ = 724989808198656. Its totient is φ = 58938666976000.

The previous prime is 221020001219981. The next prime is 221020001220013. The reversal of 221020001220000 is 22100020122.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (12).

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 19 ways as a sum of consecutive naturals, for example, 1841773344 + ... + 1841893343.

Almost surely, 2^{221020001220000} is an apocalyptic number.

221020001220000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221020001220000 is an abundant number, since it is smaller than the sum of its proper divisors (503969806978656).

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

221020001220000 is an equidigital number, since it uses as much as digits as its factorization.

221020001220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3683666720 (or 3683666697 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 221020001220000 its reverse (22100020122), we get a palindrome (221042101240122).

The spelling of 221020001220000 in words is "two hundred twenty-one trillion, twenty billion, one million, two hundred twenty thousand".