21222001210203 has 12 divisors (see below), whose sum is σ = 30951613416880. Its totient is φ = 14010641575056.

The previous prime is 21222001210199. The next prime is 21222001210217. The reversal of 21222001210203 is 30201210022212.

21222001210203 is a `hidden beast` number, since 212 + 220 + 0 + 1 + 210 + 20 + 3 = 666.

It is not a de Polignac number, because 21222001210203 - 2² = 21222001210199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222001210283) 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, 11446601668 + ... + 11446603521.

Almost surely, 2^{21222001210203} is an apocalyptic number.

21222001210203 is a deficient number, since it is larger than the sum of its proper divisors (9729612206677).

21222001210203 is a wasteful number, since it uses less digits than its factorization.

21222001210203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22893205298 (or 22893205295 counting only the distinct ones).

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

Adding to 21222001210203 its reverse (30201210022212), we get a palindrome (51423211232415).

The spelling of 21222001210203 in words is "twenty-one trillion, two hundred twenty-two billion, one million, two hundred ten thousand, two hundred three".