20221021213 has 8 divisors (see below), whose sum is σ = 20261756088. Its totient is φ = 20180319744.

The previous prime is 20221021193. The next prime is 20221021273. The reversal of 20221021213 is 31212012202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4214216889 + 16006804324 = 64917^2 + 126518^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20221021213 - 2¹⁷ = 20220890141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221021273) 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, 1450645 + ... + 1464517.

It is an arithmetic number, because the mean of its divisors is an integer number (2532719511).

Almost surely, 2^20221021213 is an apocalyptic number.

It is an amenable number.

20221021213 is a deficient number, since it is larger than the sum of its proper divisors (40734875).

20221021213 is a wasteful number, since it uses less digits than its factorization.

20221021213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16703.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20221021213 its reverse (31212012202), we get a palindrome (51433033415).

The spelling of 20221021213 in words is "twenty billion, two hundred twenty-one million, twenty-one thousand, two hundred thirteen".