21213000322 has 8 divisors (see below), whose sum is σ = 31822254972. Its totient is φ = 10605582000.

The previous prime is 21213000293. The next prime is 21213000343. The reversal of 21213000322 is 22300031212.

It can be written as a sum of positive squares in 2 ways, for example, as 20721890401 + 491109921 = 143951^2 + 22161^2 .

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

It is a super-2 number, since 2×21213000322² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21213000296 and 21213000305.

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, 429829 + ... + 476632.

Almost surely, 2^21213000322 is an apocalyptic number.

21213000322 is a deficient number, since it is larger than the sum of its proper divisors (10609254650).

21213000322 is a wasteful number, since it uses less digits than its factorization.

21213000322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918164.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21213000322 its reverse (22300031212), we get a palindrome (43513031534).

The spelling of 21213000322 in words is "twenty-one billion, two hundred thirteen million, three hundred twenty-two", and thus it is an aban number.