2001102022221 has 16 divisors (see below), whose sum is σ = 2685875996544. Its totient is φ = 1325202750144.

The previous prime is 2001102022207. The next prime is 2001102022253. The reversal of 2001102022221 is 1222202011002.

It is not a de Polignac number, because 2001102022221 - 2⁷ = 2001102022093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001102022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001102022201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1113760 + ... + 2289686.

It is an arithmetic number, because the mean of its divisors is an integer number (167867249784).

Almost surely, 2^{2001102022221} is an apocalyptic number.

It is an amenable number.

2001102022221 is a deficient number, since it is larger than the sum of its proper divisors (684773974323).

2001102022221 is a wasteful number, since it uses less digits than its factorization.

2001102022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179700.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2001102022221 its reverse (1222202011002), we get a palindrome (3223304033223).

The spelling of 2001102022221 in words is "two trillion, one billion, one hundred two million, twenty-two thousand, two hundred twenty-one".