221321131201 has 8 divisors (see below), whose sum is σ = 224448710400. Its totient is φ = 218193840480.

The previous prime is 221321131189. The next prime is 221321131249. The reversal of 221321131201 is 102131123122.

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 221321131201 - 2⁵ = 221321131169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221321134201) 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, 1821880 + ... + 1939558.

It is an arithmetic number, because the mean of its divisors is an integer number (28056088800).

Almost surely, 2^221321131201 is an apocalyptic number.

It is an amenable number.

221321131201 is a deficient number, since it is larger than the sum of its proper divisors (3127579199).

221321131201 is a wasteful number, since it uses less digits than its factorization.

221321131201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144239.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 221321131201 its reverse (102131123122), we get a palindrome (323452254323).

The spelling of 221321131201 in words is "two hundred twenty-one billion, three hundred twenty-one million, one hundred thirty-one thousand, two hundred one".