221231404421241 has 32 divisors (see below), whose sum is σ = 315010908472320. Its totient is φ = 137800657161024.

The previous prime is 221231404421231. The next prime is 221231404421297. The reversal of 221231404421241 is 142124404132122.

It is a happy number.

It is not a de Polignac number, because 221231404421241 - 2²⁷ = 221231270203513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221231404421231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 172428555 + ... + 173706848.

It is an arithmetic number, because the mean of its divisors is an integer number (9844090889760).

Almost surely, 2^{221231404421241} is an apocalyptic number.

It is an amenable number.

221231404421241 is a deficient number, since it is larger than the sum of its proper divisors (93779504051079).

221231404421241 is a wasteful number, since it uses less digits than its factorization.

221231404421241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346135645.

The product of its (nonzero) digits is 24576, while the sum is 33.

Adding to 221231404421241 its reverse (142124404132122), we get a palindrome (363355808553363).

The spelling of 221231404421241 in words is "two hundred twenty-one trillion, two hundred thirty-one billion, four hundred four million, four hundred twenty-one thousand, two hundred forty-one".