21021022302 has 128 divisors (see below), whose sum is σ = 50311618560. Its totient is φ = 5728665600.

The previous prime is 21021022279. The next prime is 21021022333. The reversal of 21021022302 is 20322012012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 52421302 + ... + 52421702.

It is an arithmetic number, because the mean of its divisors is an integer number (393059520).

Almost surely, 2^21021022302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21021022302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25155809280).

21021022302 is an abundant number, since it is smaller than the sum of its proper divisors (29290596258).

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

21021022302 is a wasteful number, since it uses less digits than its factorization.

21021022302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21021022302 its reverse (20322012012), we get a palindrome (41343034314).

The spelling of 21021022302 in words is "twenty-one billion, twenty-one million, twenty-two thousand, three hundred two".