221421133414431 has 16 divisors (see below), whose sum is σ = 328052106407520. Its totient is φ = 147604730002560.

The previous prime is 221421133414387. The next prime is 221421133414433. The reversal of 221421133414431 is 134414331124122.

221421133414431 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 211 + 3 + 3 + 4 + 1 + 4 + 431 = 666.

It is not a de Polignac number, because 221421133414431 - 2³⁰ = 221420059672607 is a prime.

It is a super-2 number, since 2×221421133414431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221421133414433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259536810 + ... + 260388551.

It is an arithmetic number, because the mean of its divisors is an integer number (20503256650470).

Almost surely, 2^{221421133414431} is an apocalyptic number.

221421133414431 is a deficient number, since it is larger than the sum of its proper divisors (106630972993089).

221421133414431 is a wasteful number, since it uses less digits than its factorization.

221421133414431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519941143 (or 519941137 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

Adding to 221421133414431 its reverse (134414331124122), we get a palindrome (355835464538553).

The spelling of 221421133414431 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, one hundred thirty-three million, four hundred fourteen thousand, four hundred thirty-one".