21314220201 has 20 divisors (see below), whose sum is σ = 32082828624. Its totient is φ = 14101003800.

The previous prime is 21314220199. The next prime is 21314220227. The reversal of 21314220201 is 10202241312.

It is a happy number.

It is not a de Polignac number, because 21314220201 - 2¹ = 21314220199 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21314220001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 993735 + ... + 1014956.

Almost surely, 2^21314220201 is an apocalyptic number.

It is an amenable number.

21314220201 is a deficient number, since it is larger than the sum of its proper divisors (10768608423).

21314220201 is a wasteful number, since it uses less digits than its factorization.

21314220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008834 (or 2008825 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21314220201 its reverse (10202241312), we get a palindrome (31516461513).

The spelling of 21314220201 in words is "twenty-one billion, three hundred fourteen million, two hundred twenty thousand, two hundred one".