211221010003 has 2 divisors, whose sum is σ = 211221010004. Its totient is φ = 211221010002.

The previous prime is 211221009953. The next prime is 211221010109. The reversal of 211221010003 is 300010122112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211221010003 - 2⁹ = 211221009491 is a prime.

It is a super-3 number, since 3×211221010003³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (211221070003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610505001 + 105610505002.

It is an arithmetic number, because the mean of its divisors is an integer number (105610505002).

Almost surely, 2^211221010003 is an apocalyptic number.

211221010003 is a deficient number, since it is larger than the sum of its proper divisors (1).

211221010003 is an equidigital number, since it uses as much as digits as its factorization.

211221010003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 211221010003 its reverse (300010122112), we get a palindrome (511231132115).

The spelling of 211221010003 in words is "two hundred eleven billion, two hundred twenty-one million, ten thousand, three".