21111100040003 has 2 divisors, whose sum is σ = 21111100040004. Its totient is φ = 21111100040002.

The previous prime is 21111100039937. The next prime is 21111100040053. The reversal of 21111100040003 is 30004000111112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21111100040003 - 2¹⁶ = 21111099974467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21111100040003.

It is not a weakly prime, because it can be changed into another prime (21111100040053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555550020001 + 10555550020002.

It is an arithmetic number, because the mean of its divisors is an integer number (10555550020002).

Almost surely, 2^{21111100040003} is an apocalyptic number.

21111100040003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21111100040003 is an equidigital number, since it uses as much as digits as its factorization.

21111100040003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21111100040003 its reverse (30004000111112), we get a palindrome (51115100151115).

The spelling of 21111100040003 in words is "twenty-one trillion, one hundred eleven billion, one hundred million, forty thousand, three".