21011210111003 has 48 divisors (see below), whose sum is σ = 25769508480000. Its totient is φ = 17034238726848.

The previous prime is 21011210110967. The next prime is 21011210111069. The reversal of 21011210111003 is 30011101211012.

It is not a de Polignac number, because 21011210111003 - 2⁸ = 21011210110747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21011210114003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1729453973 + ... + 1729466121.

It is an arithmetic number, because the mean of its divisors is an integer number (536864760000).

Almost surely, 2^{21011210111003} is an apocalyptic number.

21011210111003 is a deficient number, since it is larger than the sum of its proper divisors (4758298368997).

21011210111003 is a wasteful number, since it uses less digits than its factorization.

21011210111003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15024 (or 15017 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 21011210111003 its reverse (30011101211012), we get a palindrome (51022311322015).

The spelling of 21011210111003 in words is "twenty-one trillion, eleven billion, two hundred ten million, one hundred eleven thousand, three".