21221032201 has 8 divisors (see below), whose sum is σ = 21260177600. Its totient is φ = 21181912560.

The previous prime is 21221032193. The next prime is 21221032229. The reversal of 21221032201 is 10223012212.

It is a happy number.

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 21221032201 - 2³ = 21221032193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21221032241) 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, 2454955 + ... + 2463583.

It is an arithmetic number, because the mean of its divisors is an integer number (2657522200).

Almost surely, 2^21221032201 is an apocalyptic number.

It is an amenable number.

21221032201 is a deficient number, since it is larger than the sum of its proper divisors (39145399).

21221032201 is an equidigital number, since it uses as much as digits as its factorization.

21221032201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12879.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21221032201 its reverse (10223012212), we get a palindrome (31444044413).

The spelling of 21221032201 in words is "twenty-one billion, two hundred twenty-one million, thirty-two thousand, two hundred one".