221300312001 has 4 divisors (see below), whose sum is σ = 295067082672. Its totient is φ = 147533541332.

The previous prime is 221300311997. The next prime is 221300312003. The reversal of 221300312001 is 100213003122.

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 221300312001 - 2² = 221300311997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221300312003) 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, 36883385331 + ... + 36883385336.

It is an arithmetic number, because the mean of its divisors is an integer number (73766770668).

Almost surely, 2^221300312001 is an apocalyptic number.

It is an amenable number.

221300312001 is a deficient number, since it is larger than the sum of its proper divisors (73766770671).

221300312001 is an equidigital number, since it uses as much as digits as its factorization.

221300312001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73766770670.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 221300312001 its reverse (100213003122), we get a palindrome (321513315123).

The spelling of 221300312001 in words is "two hundred twenty-one billion, three hundred million, three hundred twelve thousand, one".