20202203221 has 4 divisors (see below), whose sum is σ = 20226751072. Its totient is φ = 20177655372.

The previous prime is 20202203201. The next prime is 20202203239. The reversal of 20202203221 is 12230220202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12230220202 = 2 ⋅6115110101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20202203221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20202203195 and 20202203204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202203201) 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, 12272691 + ... + 12274336.

It is an arithmetic number, because the mean of its divisors is an integer number (5056687768).

Almost surely, 2^20202203221 is an apocalyptic number.

It is an amenable number.

20202203221 is a deficient number, since it is larger than the sum of its proper divisors (24547851).

20202203221 is an equidigital number, since it uses as much as digits as its factorization.

20202203221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24547850.

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 20202203221 its reverse (12230220202), we get a palindrome (32432423423).

The spelling of 20202203221 in words is "twenty billion, two hundred two million, two hundred three thousand, two hundred twenty-one".