20211201 has 10 divisors (see below), whose sum is σ = 30192162. Its totient is φ = 13474080.

The previous prime is 20211197. The next prime is 20211203. The reversal of 20211201 is 10211202.

It can be written as a sum of positive squares in only one way, i.e., 17438976 + 2772225 = 4176^2 + 1665^2 .

It is not a de Polignac number, because 20211201 - 2² = 20211197 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (20211203) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 124680 + ... + 124841.

Almost surely, 2^20211201 is an apocalyptic number.

It is an amenable number.

20211201 is a deficient number, since it is larger than the sum of its proper divisors (9980961).

20211201 is an equidigital number, since it uses as much as digits as its factorization.

20211201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249533 (or 249524 counting only the distinct ones).

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

The square root of 20211201 is about 4495.6869330504. The cubic root of 20211201 is about 272.3938974743.

Adding to 20211201 its reverse (10211202), we get a palindrome (30422403).

Subtracting from 20211201 its reverse (10211202), we obtain a palindrome (9999999).

The spelling of 20211201 in words is "twenty million, two hundred eleven thousand, two hundred one".