21033030102 has 64 divisors (see below), whose sum is σ = 49654677504. Its totient is φ = 5812261920.

The previous prime is 21033030059. The next prime is 21033030119. The reversal of 21033030102 is 20103033012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3052353 + ... + 3059235.

It is an arithmetic number, because the mean of its divisors is an integer number (775854336).

Almost surely, 2^21033030102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21033030102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24827338752).

21033030102 is an abundant number, since it is smaller than the sum of its proper divisors (28621647402).

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

21033030102 is a wasteful number, since it uses less digits than its factorization.

21033030102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9273.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21033030102 its reverse (20103033012), we get a palindrome (41136063114).

The spelling of 21033030102 in words is "twenty-one billion, thirty-three million, thirty thousand, one hundred two".