21201222203 has 8 divisors (see below), whose sum is σ = 24231682272. Its totient is φ = 18171190656.

The previous prime is 21201222199. The next prime is 21201222209. The reversal of 21201222203 is 30222210212.

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 21201222203 - 2² = 21201222199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21201222209) 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, 7001 + ... + 206037.

It is an arithmetic number, because the mean of its divisors is an integer number (3028960284).

Almost surely, 2^21201222203 is an apocalyptic number.

21201222203 is a deficient number, since it is larger than the sum of its proper divisors (3030460069).

21201222203 is a wasteful number, since it uses less digits than its factorization.

21201222203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214261.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21201222203 its reverse (30222210212), we get a palindrome (51423432415).

The spelling of 21201222203 in words is "twenty-one billion, two hundred one million, two hundred twenty-two thousand, two hundred three".