2001100221021 has 8 divisors (see below), whose sum is σ = 2910691230624. Its totient is φ = 1212788012720.

The previous prime is 2001100221017. The next prime is 2001100221101. The reversal of 2001100221021 is 1201220011002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2001100221021 - 2² = 2001100221017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001100220988 and 2001100221006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001100261021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30319700286 + ... + 30319700351.

It is an arithmetic number, because the mean of its divisors is an integer number (363836403828).

Almost surely, 2^{2001100221021} is an apocalyptic number.

It is an amenable number.

2001100221021 is a deficient number, since it is larger than the sum of its proper divisors (909591009603).

2001100221021 is a wasteful number, since it uses less digits than its factorization.

2001100221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60639400651.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2001100221021 its reverse (1201220011002), we get a palindrome (3202320232023).

The spelling of 2001100221021 in words is "two trillion, one billion, one hundred million, two hundred twenty-one thousand, twenty-one".