21123012330003 has 16 divisors (see below), whose sum is σ = 30548058006816. Its totient is φ = 12930394920960.

The previous prime is 21123012330001. The next prime is 21123012330011. The reversal of 21123012330003 is 30003321032112.

It is not a de Polignac number, because 21123012330003 - 2¹ = 21123012330001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21123012330001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5050933426 + ... + 5050937607.

It is an arithmetic number, because the mean of its divisors is an integer number (1909253625426).

Almost surely, 2^{21123012330003} is an apocalyptic number.

21123012330003 is a deficient number, since it is larger than the sum of its proper divisors (9425045676813).

21123012330003 is a wasteful number, since it uses less digits than its factorization.

21123012330003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10101871094.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21123012330003 its reverse (30003321032112), we get a palindrome (51126333362115).

The spelling of 21123012330003 in words is "twenty-one trillion, one hundred twenty-three billion, twelve million, three hundred thirty thousand, three".