202203023213221 has 4 divisors (see below), whose sum is σ = 207134804267244. Its totient is φ = 197271242159200.

The previous prime is 202203023213209. The next prime is 202203023213231. The reversal of 202203023213221 is 122312320302202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57797474076225 + 144405549136996 = 7602465^2 + 12016886^2 .

It is not a de Polignac number, because 202203023213221 - 2¹¹ = 202203023211173 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 (202203023213231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2465890526950 + ... + 2465890527031.

It is an arithmetic number, because the mean of its divisors is an integer number (51783701066811).

Almost surely, 2^{202203023213221} is an apocalyptic number.

It is an amenable number.

202203023213221 is a deficient number, since it is larger than the sum of its proper divisors (4931781054023).

202203023213221 is an equidigital number, since it uses as much as digits as its factorization.

202203023213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4931781054022.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 202203023213221 its reverse (122312320302202), we get a palindrome (324515343515423).

The spelling of 202203023213221 in words is "two hundred two trillion, two hundred three billion, twenty-three million, two hundred thirteen thousand, two hundred twenty-one".