221122211201 has 4 divisors (see below), whose sum is σ = 221129517504. Its totient is φ = 221114904900.

The previous prime is 221122211197. The next prime is 221122211207. The reversal of 221122211201 is 102112221122.

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 221122211201 - 2² = 221122211197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221122211201.

It is not an unprimeable number, because it can be changed into a prime (221122211207) 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, 3607565 + ... + 3668346.

It is an arithmetic number, because the mean of its divisors is an integer number (55282379376).

Almost surely, 2^221122211201 is an apocalyptic number.

It is an amenable number.

221122211201 is a deficient number, since it is larger than the sum of its proper divisors (7306303).

221122211201 is an equidigital number, since it uses as much as digits as its factorization.

221122211201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7306302.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221122211201 its reverse (102112221122), we get a palindrome (323234432323).

The spelling of 221122211201 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred eleven thousand, two hundred one".