21013421302 has 16 divisors (see below), whose sum is σ = 33386077152. Its totient is φ = 9885166720.

The previous prime is 21013421293. The next prime is 21013421321. The reversal of 21013421302 is 20312431012.

It is a happy number.

21013421302 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 21013421302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10738 + ... + 205285.

It is an arithmetic number, because the mean of its divisors is an integer number (2086629822).

Almost surely, 2^21013421302 is an apocalyptic number.

21013421302 is a deficient number, since it is larger than the sum of its proper divisors (12372655850).

21013421302 is a wasteful number, since it uses less digits than its factorization.

21013421302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218903.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21013421302 its reverse (20312431012), we get a palindrome (41325852314).

The spelling of 21013421302 in words is "twenty-one billion, thirteen million, four hundred twenty-one thousand, three hundred two".