21110212003 has 2 divisors, whose sum is σ = 21110212004. Its totient is φ = 21110212002.

The previous prime is 21110211973. The next prime is 21110212099. The reversal of 21110212003 is 30021201112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21110212003 - 2⁵ = 21110211971 is a prime.

It is not a weakly prime, because it can be changed into another prime (21110212603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555106001 + 10555106002.

It is an arithmetic number, because the mean of its divisors is an integer number (10555106002).

Almost surely, 2^21110212003 is an apocalyptic number.

21110212003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110212003 is an equidigital number, since it uses as much as digits as its factorization.

21110212003 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21110212003 its reverse (30021201112), we get a palindrome (51131413115).

The spelling of 21110212003 in words is "twenty-one billion, one hundred ten million, two hundred twelve thousand, three".