221211121201 has 8 divisors (see below), whose sum is σ = 253154816960. Its totient is φ = 189352952208.

The previous prime is 221211121177. The next prime is 221211121237. The reversal of 221211121201 is 102121112122.

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

It is not a de Polignac number, because 221211121201 - 2¹⁵ = 221211088433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221211121291) 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, 21376146 + ... + 21386491.

It is an arithmetic number, because the mean of its divisors is an integer number (31644352120).

Almost surely, 2^221211121201 is an apocalyptic number.

It is an amenable number.

221211121201 is a deficient number, since it is larger than the sum of its proper divisors (31943695759).

221211121201 is an equidigital number, since it uses as much as digits as its factorization.

221211121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42763383.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221211121201 its reverse (102121112122), we get a palindrome (323332233323).

The spelling of 221211121201 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred twenty-one thousand, two hundred one".