2000011221 has 24 divisors (see below), whose sum is σ = 3211493376. Its totient is φ = 1191071520.

The previous prime is 2000011219. The next prime is 2000011241. The reversal of 2000011221 is 1221100002.

It is not a de Polignac number, because 2000011221 - 2¹ = 2000011219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000011241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 272085 + ... + 279338.

It is an arithmetic number, because the mean of its divisors is an integer number (133812224).

Almost surely, 2^2000011221 is an apocalyptic number.

It is an amenable number.

2000011221 is a deficient number, since it is larger than the sum of its proper divisors (1211482155).

2000011221 is a wasteful number, since it uses less digits than its factorization.

2000011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551473 (or 551470 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2000011221 is about 44721.4850044137. The cubic root of 2000011221 is about 1259.9234061528.

Adding to 2000011221 its reverse (1221100002), we get a palindrome (3221111223).

The spelling of 2000011221 in words is "two billion, eleven thousand, two hundred twenty-one".