221120210001 has 4 divisors (see below), whose sum is σ = 294826946672. Its totient is φ = 147413473332.

The previous prime is 221120209963. The next prime is 221120210011. The reversal of 221120210001 is 100012021122.

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.

It is not a de Polignac number, because 221120210001 - 2⁹ = 221120209489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221120210011) 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, 36853368331 + ... + 36853368336.

It is an arithmetic number, because the mean of its divisors is an integer number (73706736668).

Almost surely, 2^221120210001 is an apocalyptic number.

It is an amenable number.

221120210001 is a deficient number, since it is larger than the sum of its proper divisors (73706736671).

221120210001 is an equidigital number, since it uses as much as digits as its factorization.

221120210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73706736670.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221120210001 its reverse (100012021122), we get a palindrome (321132231123).

The spelling of 221120210001 in words is "two hundred twenty-one billion, one hundred twenty million, two hundred ten thousand, one".