2001000222221 has 48 divisors (see below), whose sum is σ = 2739250882368. Its totient is φ = 1436850777600.

The previous prime is 2001000222187. The next prime is 2001000222269. The reversal of 2001000222221 is 1222220001002.

It is not a de Polignac number, because 2001000222221 - 2¹⁸ = 2000999960077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001000222196 and 2001000222205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001000222281) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3914366 + ... + 4395936.

It is an arithmetic number, because the mean of its divisors is an integer number (57067726716).

Almost surely, 2^{2001000222221} is an apocalyptic number.

It is an amenable number.

2001000222221 is a deficient number, since it is larger than the sum of its proper divisors (738250660147).

2001000222221 is a wasteful number, since it uses less digits than its factorization.

2001000222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482202 (or 482195 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 2001000222221 its reverse (1222220001002), we get a palindrome (3223220223223).

The spelling of 2001000222221 in words is "two trillion, one billion, two hundred twenty-two thousand, two hundred twenty-one".