21111010111003 has 2 divisors, whose sum is σ = 21111010111004. Its totient is φ = 21111010111002.

The previous prime is 21111010110997. The next prime is 21111010111039. The reversal of 21111010111003 is 30011101011112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21111010111003 - 2⁴¹ = 18911986855451 is a prime.

It is not a weakly prime, because it can be changed into another prime (21111010111063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555505055501 + 10555505055502.

It is an arithmetic number, because the mean of its divisors is an integer number (10555505055502).

Almost surely, 2^{21111010111003} is an apocalyptic number.

21111010111003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21111010111003 is an equidigital number, since it uses as much as digits as its factorization.

21111010111003 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 13.

Adding to 21111010111003 its reverse (30011101011112), we get a palindrome (51122111122115).

The spelling of 21111010111003 in words is "twenty-one trillion, one hundred eleven billion, ten million, one hundred eleven thousand, three".