200011021 has 16 divisors (see below), whose sum is σ = 232769664. Its totient is φ = 168321024.

The previous prime is 200010983. The next prime is 200011033. The reversal of 200011021 is 120110002.

It is a cyclic number.

It is not a de Polignac number, because 200011021 - 2⁷ = 200010893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200010995 and 200011013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200011061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130566 + ... + 132088.

It is an arithmetic number, because the mean of its divisors is an integer number (14548104).

Almost surely, 2^200011021 is an apocalyptic number.

It is an amenable number.

200011021 is a deficient number, since it is larger than the sum of its proper divisors (32758643).

200011021 is a wasteful number, since it uses less digits than its factorization.

200011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860.

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

The square root of 200011021 is about 14142.5252695549. The cubic root of 200011021 is about 584.8142893118.

Adding to 200011021 its reverse (120110002), we get a palindrome (320121023).

The spelling of 200011021 in words is "two hundred million, eleven thousand, twenty-one".