221122100201 has 4 divisors (see below), whose sum is σ = 221123171712. Its totient is φ = 221121028692.

The previous prime is 221122100197. The next prime is 221122100249. The reversal of 221122100201 is 102001221122.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 221122100201 - 2² = 221122100197 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 (221122100281) 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, 117221 + ... + 675266.

It is an arithmetic number, because the mean of its divisors is an integer number (55280792928).

Almost surely, 2^221122100201 is an apocalyptic number.

It is an amenable number.

221122100201 is a deficient number, since it is larger than the sum of its proper divisors (1071511).

221122100201 is an equidigital number, since it uses as much as digits as its factorization.

221122100201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071510.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221122100201 its reverse (102001221122), we get a palindrome (323123321323).

The spelling of 221122100201 in words is "two hundred twenty-one billion, one hundred twenty-two million, one hundred thousand, two hundred one".