221001210201 has 4 divisors (see below), whose sum is σ = 294668280272. Its totient is φ = 147334140132.

The previous prime is 221001210193. The next prime is 221001210203. The reversal of 221001210201 is 102012100122.

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 221001210201 - 2³ = 221001210193 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 (221001210203) 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, 36833535031 + ... + 36833535036.

It is an arithmetic number, because the mean of its divisors is an integer number (73667070068).

Almost surely, 2^221001210201 is an apocalyptic number.

It is an amenable number.

221001210201 is a deficient number, since it is larger than the sum of its proper divisors (73667070071).

221001210201 is an equidigital number, since it uses as much as digits as its factorization.

221001210201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73667070070.

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

Adding to 221001210201 its reverse (102012100122), we get a palindrome (323013310323).

The spelling of 221001210201 in words is "two hundred twenty-one billion, one million, two hundred ten thousand, two hundred one".