20212201 has 8 divisors (see below), whose sum is σ = 21475584. Its totient is φ = 18957120.

The previous prime is 20212187. The next prime is 20212223. The reversal of 20212201 is 10221202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20212201 - 2¹⁵ = 20179433 is a prime.

It is a super-3 number, since 3×20212201³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3376 + ... + 7198.

It is an arithmetic number, because the mean of its divisors is an integer number (2684448).

Almost surely, 2^20212201 is an apocalyptic number.

It is an amenable number.

20212201 is a deficient number, since it is larger than the sum of its proper divisors (1263383).

20212201 is a wasteful number, since it uses less digits than its factorization.

20212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4151.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 20212201 is about 4495.7981493835. The cubic root of 20212201 is about 272.3983898580.

Adding to 20212201 its reverse (10221202), we get a palindrome (30433403).

Subtracting from 20212201 its reverse (10221202), we obtain a palindrome (9990999).

It can be divided in two parts, 202 and 12201, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 20212201 in words is "twenty million, two hundred twelve thousand, two hundred one".