21300123002 has 16 divisors (see below), whose sum is σ = 32989689600. Its totient is φ = 10303744320.

The previous prime is 21300123001. The next prime is 21300123017. The reversal of 21300123002 is 20032100312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21300123001) 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 7 ways as a sum of consecutive naturals, for example, 196949 + ... + 285287.

It is an arithmetic number, because the mean of its divisors is an integer number (2061855600).

Almost surely, 2^21300123002 is an apocalyptic number.

21300123002 is a deficient number, since it is larger than the sum of its proper divisors (11689566598).

21300123002 is a wasteful number, since it uses less digits than its factorization.

21300123002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92261.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21300123002 its reverse (20032100312), we get a palindrome (41332223314).

The spelling of 21300123002 in words is "twenty-one billion, three hundred million, one hundred twenty-three thousand, two".