21000301323 has 16 divisors (see below), whose sum is σ = 29477184000. Its totient is φ = 13261963680.

The previous prime is 21000301319. The next prime is 21000301351. The reversal of 21000301323 is 32310300012.

It is not a de Polignac number, because 21000301323 - 2² = 21000301319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21000301303) 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, 1019278 + ... + 1039676.

It is an arithmetic number, because the mean of its divisors is an integer number (1842324000).

Almost surely, 2^21000301323 is an apocalyptic number.

21000301323 is a deficient number, since it is larger than the sum of its proper divisors (8476882677).

21000301323 is a wasteful number, since it uses less digits than its factorization.

21000301323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38482.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21000301323 its reverse (32310300012), we get a palindrome (53310601335).

The spelling of 21000301323 in words is "twenty-one billion, three hundred one thousand, three hundred twenty-three".