221232400401 has 8 divisors (see below), whose sum is σ = 294982572640. Its totient is φ = 147485247552.

The previous prime is 221232400399. The next prime is 221232400409. The reversal of 221232400401 is 104004232122.

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

It is not a de Polignac number, because 221232400401 - 2¹ = 221232400399 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221232400409) 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, 577960 + ... + 881193.

It is an arithmetic number, because the mean of its divisors is an integer number (36872821580).

Almost surely, 2^221232400401 is an apocalyptic number.

It is an amenable number.

221232400401 is a deficient number, since it is larger than the sum of its proper divisors (73750172239).

221232400401 is a wasteful number, since it uses less digits than its factorization.

221232400401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509695.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 221232400401 its reverse (104004232122), we get a palindrome (325236632523).

The spelling of 221232400401 in words is "two hundred twenty-one billion, two hundred thirty-two million, four hundred thousand, four hundred one".