221432132401 has 8 divisors (see below), whose sum is σ = 235767373920. Its totient is φ = 207242426688.

The previous prime is 221432132393. The next prime is 221432132447. The reversal of 221432132401 is 104231234122.

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 221432132401 - 2³ = 221432132393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221432162401) 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, 36380811 + ... + 36386896.

It is an arithmetic number, because the mean of its divisors is an integer number (29470921740).

Almost surely, 2^221432132401 is an apocalyptic number.

It is an amenable number.

221432132401 is a deficient number, since it is larger than the sum of its proper divisors (14335241519).

221432132401 is a wasteful number, since it uses less digits than its factorization.

221432132401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72767903.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 221432132401 its reverse (104231234122), we get a palindrome (325663366523).

The spelling of 221432132401 in words is "two hundred twenty-one billion, four hundred thirty-two million, one hundred thirty-two thousand, four hundred one".