21111113003 has 2 divisors, whose sum is σ = 21111113004. Its totient is φ = 21111113002.

The previous prime is 21111112961. The next prime is 21111113137. The reversal of 21111113003 is 30031111112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21111113003 - 2²⁰ = 21110064427 is a prime.

It is not a weakly prime, because it can be changed into another prime (21111116003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555556501 + 10555556502.

It is an arithmetic number, because the mean of its divisors is an integer number (10555556502).

Almost surely, 2^21111113003 is an apocalyptic number.

21111113003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21111113003 is an equidigital number, since it uses as much as digits as its factorization.

21111113003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 21111113003 its reverse (30031111112), we get a palindrome (51142224115).

The spelling of 21111113003 in words is "twenty-one billion, one hundred eleven million, one hundred thirteen thousand, three".