1000021201 has 16 divisors (see below), whose sum is σ = 1054025280. Its totient is φ = 947681280.

The previous prime is 1000021193. The next prime is 1000021229. The reversal of 1000021201 is 1021200001.

It is a cyclic number.

It is not a de Polignac number, because 1000021201 - 2³ = 1000021193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000021261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 338790 + ... + 341728.

It is an arithmetic number, because the mean of its divisors is an integer number (65876580).

Almost surely, 2^1000021201 is an apocalyptic number.

It is an amenable number.

1000021201 is a deficient number, since it is larger than the sum of its proper divisors (54004079).

1000021201 is a wasteful number, since it uses less digits than its factorization.

1000021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1000021201 is about 31623.1118171504. Note that the first 3 decimals coincide. The cubic root of 1000021201 is about 1000.0070669501.

Adding to 1000021201 its reverse (1021200001), we get a palindrome (2021221202).

The spelling of 1000021201 in words is "one billion, twenty-one thousand, two hundred one".