21132201 has 8 divisors (see below), whose sum is σ = 28450240. Its totient is φ = 13951152.

The previous prime is 21132197. The next prime is 21132211. The reversal of 21132201 is 10223112.

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

It is not a de Polignac number, because 21132201 - 2² = 21132197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21132211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33886 + ... + 34503.

It is an arithmetic number, because the mean of its divisors is an integer number (3556280).

Almost surely, 2^21132201 is an apocalyptic number.

It is an amenable number.

21132201 is a deficient number, since it is larger than the sum of its proper divisors (7318039).

21132201 is a wasteful number, since it uses less digits than its factorization.

21132201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68495.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 21132201 is about 4596.9773764943. The cubic root of 21132201 is about 276.4701475357.

Adding to 21132201 its reverse (10223112), we get a palindrome (31355313).

The spelling of 21132201 in words is "twenty-one million, one hundred thirty-two thousand, two hundred one".