2000021202221 has 72 divisors (see below), whose sum is σ = 2519026547400. Its totient is φ = 1582708377600.

The previous prime is 2000021202191. The next prime is 2000021202227. The reversal of 2000021202221 is 1222021200002.

It can be written as a sum of positive squares in 12 ways, for example, as 376856020996 + 1623165181225 = 613886^2 + 1274035^2 .

It is not a de Polignac number, because 2000021202221 - 2³⁴ = 1982841333037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2000021202196 and 2000021202205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000021202227) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 155892035 + ... + 155904863.

It is an arithmetic number, because the mean of its divisors is an integer number (34986479825).

Almost surely, 2^{2000021202221} is an apocalyptic number.

It is an amenable number.

2000021202221 is a deficient number, since it is larger than the sum of its proper divisors (519005345179).

2000021202221 is a wasteful number, since it uses less digits than its factorization.

2000021202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13087 (or 13063 counting only the distinct ones).

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

Adding to 2000021202221 its reverse (1222021200002), we get a palindrome (3222042402223).

The spelling of 2000021202221 in words is "two trillion, twenty-one million, two hundred two thousand, two hundred twenty-one".