221202220201 has 4 divisors (see below), whose sum is σ = 221785867600. Its totient is φ = 220618572804.

The previous prime is 221202220193. The next prime is 221202220237. The reversal of 221202220201 is 102022202122.

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: 102022202122 = 2 ⋅51011101061.

It is a cyclic number.

It is not a de Polignac number, because 221202220201 - 2³ = 221202220193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221202220501) 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, 291823131 + ... + 291823888.

It is an arithmetic number, because the mean of its divisors is an integer number (55446466900).

Almost surely, 2^221202220201 is an apocalyptic number.

It is an amenable number.

221202220201 is a deficient number, since it is larger than the sum of its proper divisors (583647399).

221202220201 is an equidigital number, since it uses as much as digits as its factorization.

221202220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583647398.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 221202220201 its reverse (102022202122), we get a palindrome (323224422323).

The spelling of 221202220201 in words is "two hundred twenty-one billion, two hundred two million, two hundred twenty thousand, two hundred one".