221211133401 has 8 divisors (see below), whose sum is σ = 295121990304. Its totient is φ = 147387182720.

The previous prime is 221211133399. The next prime is 221211133499. The reversal of 221211133401 is 104331112122.

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 221211133401 - 2¹ = 221211133399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221211133201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21720615 + ... + 21730796.

It is an arithmetic number, because the mean of its divisors is an integer number (36890248788).

Almost surely, 2^221211133401 is an apocalyptic number.

It is an amenable number.

221211133401 is a deficient number, since it is larger than the sum of its proper divisors (73910856903).

221211133401 is a wasteful number, since it uses less digits than its factorization.

221211133401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43453111.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 221211133401 its reverse (104331112122), we get a palindrome (325542245523).

The spelling of 221211133401 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred thirty-three thousand, four hundred one".