21011101210003 has 2 divisors, whose sum is σ = 21011101210004. Its totient is φ = 21011101210002.

The previous prime is 21011101209941. The next prime is 21011101210037. The reversal of 21011101210003 is 30001210111012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21011101210003 - 2⁹ = 21011101209491 is a prime.

It is not a weakly prime, because it can be changed into another prime (21011101210403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505550605001 + 10505550605002.

It is an arithmetic number, because the mean of its divisors is an integer number (10505550605002).

Almost surely, 2^{21011101210003} is an apocalyptic number.

21011101210003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011101210003 is an equidigital number, since it uses as much as digits as its factorization.

21011101210003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21011101210003 its reverse (30001210111012), we get a palindrome (51012311321015).

The spelling of 21011101210003 in words is "twenty-one trillion, eleven billion, one hundred one million, two hundred ten thousand, three".