20213213321 has 8 divisors (see below), whose sum is σ = 23102237760. Its totient is φ = 17324544528.

The previous prime is 20213213297. The next prime is 20213213357. The reversal of 20213213321 is 12331231202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20213213321 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20213213293 and 20213213302.

It is not an unprimeable number, because it can be changed into a prime (20213213921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46670 + ... + 206408.

It is an arithmetic number, because the mean of its divisors is an integer number (2887779720).

Almost surely, 2^20213213321 is an apocalyptic number.

It is an amenable number.

20213213321 is a deficient number, since it is larger than the sum of its proper divisors (2889024439).

20213213321 is a wasteful number, since it uses less digits than its factorization.

20213213321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177823.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20213213321 its reverse (12331231202), we get a palindrome (32544444523).

The spelling of 20213213321 in words is "twenty billion, two hundred thirteen million, two hundred thirteen thousand, three hundred twenty-one".