21002505322 has 8 divisors (see below), whose sum is σ = 31520691972. Its totient is φ = 10495608000.

The previous prime is 21002505287. The next prime is 21002505341. The reversal of 21002505322 is 22350520012.

It can be written as a sum of positive squares in 2 ways, for example, as 20664350001 + 338155321 = 143751^2 + 18389^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21002505322² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21002505293 and 21002505302.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2817679 + ... + 2825122.

Almost surely, 2^21002505322 is an apocalyptic number.

21002505322 is a deficient number, since it is larger than the sum of its proper divisors (10518186650).

21002505322 is a wasteful number, since it uses less digits than its factorization.

21002505322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5644664.

The product of its (nonzero) digits is 1200, while the sum is 22.

The spelling of 21002505322 in words is "twenty-one billion, two million, five hundred five thousand, three hundred twenty-two".