2001022022221 has 16 divisors (see below), whose sum is σ = 2116719618048. Its totient is φ = 1888802467200.

The previous prime is 2001022022183. The next prime is 2001022022227. The reversal of 2001022022221 is 1222202201002.

It is a cyclic number.

It is not a de Polignac number, because 2001022022221 - 2¹³ = 2001022014029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001022022195 and 2001022022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001022022227) 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, 1916760 + ... + 2770561.

It is an arithmetic number, because the mean of its divisors is an integer number (132294976128).

Almost surely, 2^{2001022022221} is an apocalyptic number.

It is an amenable number.

2001022022221 is a deficient number, since it is larger than the sum of its proper divisors (115697595827).

2001022022221 is a wasteful number, since it uses less digits than its factorization.

2001022022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4687692.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 2001022022221 its reverse (1222202201002), we get a palindrome (3223224223223).

The spelling of 2001022022221 in words is "two trillion, one billion, twenty-two million, twenty-two thousand, two hundred twenty-one".