2001111110221 has 8 divisors (see below), whose sum is σ = 2012541633344. Its totient is φ = 1989698951520.

The previous prime is 2001111110203. The next prime is 2001111110227. The reversal of 2001111110221 is 1220111111002.

It is a happy number.

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 2001111110221 - 2²¹ = 2001109013069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001111110227) 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, 4372521 + ... + 4808446.

It is an arithmetic number, because the mean of its divisors is an integer number (251567704168).

Almost surely, 2^{2001111110221} is an apocalyptic number.

It is an amenable number.

2001111110221 is a deficient number, since it is larger than the sum of its proper divisors (11430523123).

2001111110221 is a wasteful number, since it uses less digits than its factorization.

2001111110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9182211.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2001111110221 its reverse (1220111111002), we get a palindrome (3221222221223).

The spelling of 2001111110221 in words is "two trillion, one billion, one hundred eleven million, one hundred ten thousand, two hundred twenty-one".