221301421001 has 4 divisors (see below), whose sum is σ = 221388584400. Its totient is φ = 221214257604.

The previous prime is 221301420997. The next prime is 221301421049. The reversal of 221301421001 is 100124103122.

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 a cyclic number.

It is not a de Polignac number, because 221301421001 - 2² = 221301420997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221301421051) 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, 43577891 + ... + 43582968.

It is an arithmetic number, because the mean of its divisors is an integer number (55347146100).

Almost surely, 2^221301421001 is an apocalyptic number.

It is an amenable number.

221301421001 is a deficient number, since it is larger than the sum of its proper divisors (87163399).

221301421001 is an equidigital number, since it uses as much as digits as its factorization.

221301421001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87163398.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221301421001 its reverse (100124103122), we get a palindrome (321425524123).

The spelling of 221301421001 in words is "two hundred twenty-one billion, three hundred one million, four hundred twenty-one thousand, one".