21030132102 has 128 divisors (see below), whose sum is σ = 51213235200. Its totient is φ = 5623727616.

The previous prime is 21030131963. The next prime is 21030132107. The reversal of 21030132102 is 20123103012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030132107) by changing a digit.

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, 28690128 + ... + 28690860.

It is an arithmetic number, because the mean of its divisors is an integer number (400103400).

Almost surely, 2^21030132102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21030132102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25606617600).

21030132102 is an abundant number, since it is smaller than the sum of its proper divisors (30183103098).

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

21030132102 is a wasteful number, since it uses less digits than its factorization.

21030132102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21030132102 its reverse (20123103012), we get a palindrome (41153235114).

The spelling of 21030132102 in words is "twenty-one billion, thirty million, one hundred thirty-two thousand, one hundred two".