21212200201 has 8 divisors (see below), whose sum is σ = 21575940320. Its totient is φ = 20849846688.

The previous prime is 21212200187. The next prime is 21212200253. The reversal of 21212200201 is 10200221212.

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 21212200201 - 2⁹ = 21212199689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21212200291) 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, 315771 + ... + 377008.

It is an arithmetic number, because the mean of its divisors is an integer number (2696992540).

Almost surely, 2^21212200201 is an apocalyptic number.

It is an amenable number.

21212200201 is a deficient number, since it is larger than the sum of its proper divisors (363740119).

21212200201 is an equidigital number, since it uses as much as digits as its factorization.

21212200201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693303.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21212200201 its reverse (10200221212), we get a palindrome (31412421413).

The spelling of 21212200201 in words is "twenty-one billion, two hundred twelve million, two hundred thousand, two hundred one".