221302001 has 8 divisors (see below), whose sum is σ = 223841664. Its totient is φ = 218771280.

The previous prime is 221301967. The next prime is 221302007. The reversal of 221302001 is 100203122.

It is a happy number.

221302001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221302001 - 2¹⁸ = 221039857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221302007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55976 + ... + 59798.

It is an arithmetic number, because the mean of its divisors is an integer number (27980208).

Almost surely, 2^221302001 is an apocalyptic number.

It is an amenable number.

221302001 is a deficient number, since it is larger than the sum of its proper divisors (2539663).

221302001 is a wasteful number, since it uses less digits than its factorization.

221302001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4471.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 221302001 is about 14876.2226724394. Note that the first 3 decimals coincide. The cubic root of 221302001 is about 604.8696310857.

Adding to 221302001 its reverse (100203122), we get a palindrome (321505123).

The spelling of 221302001 in words is "two hundred twenty-one million, three hundred two thousand, one".