21324104102 has 12 divisors (see below), whose sum is σ = 37208385900. Its totient is φ = 9138901716.

The previous prime is 21324104099. The next prime is 21324104107. The reversal of 21324104102 is 20140142312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21324104107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108796352 + ... + 108796547.

It is an arithmetic number, because the mean of its divisors is an integer number (3100698825).

Almost surely, 2^21324104102 is an apocalyptic number.

21324104102 is a deficient number, since it is larger than the sum of its proper divisors (15884281798).

21324104102 is a wasteful number, since it uses less digits than its factorization.

21324104102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217592915 (or 217592908 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21324104102 its reverse (20140142312), we get a palindrome (41464246414).

The spelling of 21324104102 in words is "twenty-one billion, three hundred twenty-four million, one hundred four thousand, one hundred two".