21130321302 has 24 divisors (see below), whose sum is σ = 46235657520. Its totient is φ = 6973702800.

The previous prime is 21130321253. The next prime is 21130321337. The reversal of 21130321302 is 20312303112.

21130321302 is a `hidden beast` number, since 2 + 11 + 30 + 321 + 302 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5809602 + ... + 5813237.

It is an arithmetic number, because the mean of its divisors is an integer number (1926485730).

Almost surely, 2^21130321302 is an apocalyptic number.

21130321302 is an abundant number, since it is smaller than the sum of its proper divisors (25105336218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21130321302 is a wasteful number, since it uses less digits than its factorization.

21130321302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11622948 (or 11622945 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21130321302 its reverse (20312303112), we get a palindrome (41442624414).

The spelling of 21130321302 in words is "twenty-one billion, one hundred thirty million, three hundred twenty-one thousand, three hundred two".