221001101020000 has 120 divisors (see below), whose sum is σ = 621366696021456. Its totient is φ = 75771806016000.

The previous prime is 221001101019989. The next prime is 221001101020057. The reversal of 221001101020000 is 20101100122.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 789149647 + ... + 789429646.

Almost surely, 2^{221001101020000} is an apocalyptic number.

221001101020000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221001101020000 is an abundant number, since it is smaller than the sum of its proper divisors (400365595001456).

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

221001101020000 is an equidigital number, since it uses as much as digits as its factorization.

221001101020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578579330 (or 1578579307 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 221001101020000 its reverse (20101100122), we get a palindrome (221021202120122).

The spelling of 221001101020000 in words is "two hundred twenty-one trillion, one billion, one hundred one million, twenty thousand".