21330331302 has 32 divisors (see below), whose sum is σ = 48785536512. Its totient is φ = 6090568704.

The previous prime is 21330331201. The next prime is 21330331369. The reversal of 21330331302 is 20313303312.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90523 + ... + 225510.

It is an arithmetic number, because the mean of its divisors is an integer number (1524548016).

Almost surely, 2^21330331302 is an apocalyptic number.

21330331302 is an abundant number, since it is smaller than the sum of its proper divisors (27455205210).

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

21330331302 is a wasteful number, since it uses less digits than its factorization.

21330331302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317652.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21330331302 its reverse (20313303312), we get a palindrome (41643634614).

The spelling of 21330331302 in words is "twenty-one billion, three hundred thirty million, three hundred thirty-one thousand, three hundred two".