2001102112221 has 8 divisors (see below), whose sum is σ = 2668480056960. Its totient is φ = 1333896121152.

The previous prime is 2001102112183. The next prime is 2001102112259. The reversal of 2001102112221 is 1222112011002.

It is an interprime number because it is at equal distance from previous prime (2001102112183) and next prime (2001102112259).

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

It is not a de Polignac number, because 2001102112221 - 2¹⁵ = 2001102079453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001102112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001102112021) 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, 42961260 + ... + 43007813.

It is an arithmetic number, because the mean of its divisors is an integer number (333560007120).

Almost surely, 2^{2001102112221} is an apocalyptic number.

It is an amenable number.

2001102112221 is a deficient number, since it is larger than the sum of its proper divisors (667377944739).

2001102112221 is an equidigital number, since it uses as much as digits as its factorization.

2001102112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85976835.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2001102112221 its reverse (1222112011002), we get a palindrome (3223214123223).

The spelling of 2001102112221 in words is "two trillion, one billion, one hundred two million, one hundred twelve thousand, two hundred twenty-one".