21033201 has 24 divisors (see below), whose sum is σ = 34046784. Its totient is φ = 11494560.

The previous prime is 21033193. The next prime is 21033203. The reversal of 21033201 is 10233012.

It is a happy number.

It is not a de Polignac number, because 21033201 - 2³ = 21033193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21033203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 271 + ... + 6491.

It is an arithmetic number, because the mean of its divisors is an integer number (1418616).

Almost surely, 2^21033201 is an apocalyptic number.

21033201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21033201 is a deficient number, since it is larger than the sum of its proper divisors (13013583).

21033201 is a wasteful number, since it uses less digits than its factorization.

21033201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6261 (or 6254 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 21033201 is about 4586.1967903700. The cubic root of 21033201 is about 276.0377363861.

Adding to 21033201 its reverse (10233012), we get a palindrome (31266213).

It can be divided in two parts, 210 and 33201, that added together give a triangular number (33411 = T₂₅₈).

The spelling of 21033201 in words is "twenty-one million, thirty-three thousand, two hundred one".