21230120322 has 12 divisors (see below), whose sum is σ = 45998594070. Its totient is φ = 7076706768.

The previous prime is 21230120291. The next prime is 21230120339. The reversal of 21230120322 is 22302103212.

21230120322 is a `hidden beast` number, since 21 + 2 + 301 + 20 + 322 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21225284721 + 4835601 = 145689^2 + 2199^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1179451129 = 21230120322 / (2 + 1 + 2 + 3 + 0 + 1 + 2 + 0 + 3 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 21230120295 and 21230120304.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 589725547 + ... + 589725582.

Almost surely, 2^21230120322 is an apocalyptic number.

21230120322 is an abundant number, since it is smaller than the sum of its proper divisors (24768473748).

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

21230120322 is a wasteful number, since it uses less digits than its factorization.

21230120322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179451137 (or 1179451134 counting only the distinct ones).

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

Adding to 21230120322 its reverse (22302103212), we get a palindrome (43532223534).

The spelling of 21230120322 in words is "twenty-one billion, two hundred thirty million, one hundred twenty thousand, three hundred twenty-two".