21011110010003 has 2 divisors, whose sum is σ = 21011110010004. Its totient is φ = 21011110010002.

The previous prime is 21011110009991. The next prime is 21011110010227. The reversal of 21011110010003 is 30001001111012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21011110010003 - 2⁴ = 21011110009987 is a prime.

It is not a weakly prime, because it can be changed into another prime (21011110030003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505555005001 + 10505555005002.

It is an arithmetic number, because the mean of its divisors is an integer number (10505555005002).

Almost surely, 2^{21011110010003} is an apocalyptic number.

21011110010003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011110010003 is an equidigital number, since it uses as much as digits as its factorization.

21011110010003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 21011110010003 its reverse (30001001111012), we get a palindrome (51012111121015).

The spelling of 21011110010003 in words is "twenty-one trillion, eleven billion, one hundred ten million, ten thousand, three".