2000221212221 has 8 divisors (see below), whose sum is σ = 2070388405080. Its totient is φ = 1930133622592.

The previous prime is 2000221212169. The next prime is 2000221212239. The reversal of 2000221212221 is 1222121220002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 441434004025 + 1558787208196 = 664405^2 + 1248514^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2000221212221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2000221212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000221212271) 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, 19849670 + ... + 19950183.

It is an arithmetic number, because the mean of its divisors is an integer number (258798550635).

Almost surely, 2^{2000221212221} is an apocalyptic number.

It is an amenable number.

2000221212221 is a deficient number, since it is larger than the sum of its proper divisors (70167192859).

2000221212221 is a wasteful number, since it uses less digits than its factorization.

2000221212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39801615.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2000221212221 its reverse (1222121220002), we get a palindrome (3222342432223).

The spelling of 2000221212221 in words is "two trillion, two hundred twenty-one million, two hundred twelve thousand, two hundred twenty-one".