21221201222203 has 2 divisors, whose sum is σ = 21221201222204. Its totient is φ = 21221201222202.

The previous prime is 21221201222201. The next prime is 21221201222251. The reversal of 21221201222203 is 30222210212212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21221201222203 - 2¹ = 21221201222201 is a prime.

It is a super-3 number, since 3×21221201222203³ (a number of 41 digits) contains 333 as substring.

Together with 21221201222201, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21221201222201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610600611101 + 10610600611102.

It is an arithmetic number, because the mean of its divisors is an integer number (10610600611102).

Almost surely, 2^{21221201222203} is an apocalyptic number.

21221201222203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221201222203 is an equidigital number, since it uses as much as digits as its factorization.

21221201222203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21221201222203 its reverse (30222210212212), we get a palindrome (51443411434415).

The spelling of 21221201222203 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred one million, two hundred twenty-two thousand, two hundred three".