2221001206 has 4 divisors (see below), whose sum is σ = 3331501812. Its totient is φ = 1110500602.

The previous prime is 2221001203. The next prime is 2221001207. The reversal of 2221001206 is 6021001222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6021001222 = 2 ⋅3010500611.

It is a self number, because there is not a number n which added to its sum of digits gives 2221001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221001203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555250300 + ... + 555250303.

It is an arithmetic number, because the mean of its divisors is an integer number (832875453).

Almost surely, 2^2221001206 is an apocalyptic number.

2221001206 is a deficient number, since it is larger than the sum of its proper divisors (1110500606).

2221001206 is a wasteful number, since it uses less digits than its factorization.

2221001206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110500605.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2221001206 is about 47127.4994668718. The cubic root of 2221001206 is about 1304.7168307569.

Adding to 2221001206 its sum of digits (16), we get a palindrome (2221001222).

Adding to 2221001206 its reverse (6021001222), we get a palindrome (8242002428).

The spelling of 2221001206 in words is "two billion, two hundred twenty-one million, one thousand, two hundred six".