21231202201 has 12 divisors (see below), whose sum is σ = 23401828800. Its totient is φ = 19247290040.

The previous prime is 21231202177. The next prime is 21231202217. The reversal of 21231202201 is 10220213212.

It is a happy number.

It is not a de Polignac number, because 21231202201 - 2⁵ = 21231202169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21231205201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 200941 + ... + 287818.

It is an arithmetic number, because the mean of its divisors is an integer number (1950152400).

Almost surely, 2^21231202201 is an apocalyptic number.

It is an amenable number.

21231202201 is a deficient number, since it is larger than the sum of its proper divisors (2170626599).

21231202201 is a wasteful number, since it uses less digits than its factorization.

21231202201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489140 (or 489129 counting only the distinct ones).

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

Adding to 21231202201 its reverse (10220213212), we get a palindrome (31451415413).

The spelling of 21231202201 in words is "twenty-one billion, two hundred thirty-one million, two hundred two thousand, two hundred one".