221022202001 has 4 divisors (see below), whose sum is σ = 221028225600. Its totient is φ = 221016178404.

The previous prime is 221022201991. The next prime is 221022202019. The reversal of 221022202001 is 100202220122.

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: 100202220122 = 2 ⋅50101110061.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221022202001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221022202201) 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, 2956421 + ... + 3030258.

It is an arithmetic number, because the mean of its divisors is an integer number (55257056400).

Almost surely, 2^221022202001 is an apocalyptic number.

It is an amenable number.

221022202001 is a deficient number, since it is larger than the sum of its proper divisors (6023599).

221022202001 is an equidigital number, since it uses as much as digits as its factorization.

221022202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6023598.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 221022202001 its reverse (100202220122), we get a palindrome (321224422123).

The spelling of 221022202001 in words is "two hundred twenty-one billion, twenty-two million, two hundred two thousand, one".