21230032122 has 80 divisors (see below), whose sum is σ = 51271688160. Its totient is φ = 6527042208.

The previous prime is 21230032099. The next prime is 21230032141. The reversal of 21230032122 is 22123003212.

21230032122 is a `hidden beast` number, since 21 + 2 + 300 + 321 + 22 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21230032095 and 21230032104.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3204129 + ... + 3210747.

It is an arithmetic number, because the mean of its divisors is an integer number (640896102).

Almost surely, 2^21230032122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21230032122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25635844080).

21230032122 is an abundant number, since it is smaller than the sum of its proper divisors (30041656038).

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

21230032122 is a wasteful number, since it uses less digits than its factorization.

21230032122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8169 (or 8160 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21230032122 its reverse (22123003212), we get a palindrome (43353035334).

It can be divided in two parts, 2123003212 and 2, that multiplied together give a palindrome (4246006424).

The spelling of 21230032122 in words is "twenty-one billion, two hundred thirty million, thirty-two thousand, one hundred twenty-two".