221401242433 has 8 divisors (see below), whose sum is σ = 253034280000. Its totient is φ = 189769277040.

The previous prime is 221401242421. The next prime is 221401242437. The reversal of 221401242433 is 334242104122.

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

It is a de Polignac number, because none of the positive numbers 2^k-221401242433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221401242437) 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, 238203 + ... + 706783.

It is an arithmetic number, because the mean of its divisors is an integer number (31629285000).

Almost surely, 2^221401242433 is an apocalyptic number.

It is an amenable number.

221401242433 is a deficient number, since it is larger than the sum of its proper divisors (31633037567).

221401242433 is an equidigital number, since it uses as much as digits as its factorization.

221401242433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536087.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 221401242433 its reverse (334242104122), we get a palindrome (555643346555).

The spelling of 221401242433 in words is "two hundred twenty-one billion, four hundred one million, two hundred forty-two thousand, four hundred thirty-three".