221324411421 has 24 divisors (see below), whose sum is σ = 331563130080. Its totient is φ = 147535404912.

The previous prime is 221324411387. The next prime is 221324411519. The reversal of 221324411421 is 124114423122.

221324411421 is a `hidden beast` number, since 2 + 213 + 2 + 441 + 1 + 4 + 2 + 1 = 666.

It is not a de Polignac number, because 221324411421 - 2¹³ = 221324403229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221324413421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2888635 + ... + 2964263.

It is an arithmetic number, because the mean of its divisors is an integer number (13815130420).

Almost surely, 2^221324411421 is an apocalyptic number.

It is an amenable number.

221324411421 is a deficient number, since it is larger than the sum of its proper divisors (110238718659).

221324411421 is an equidigital number, since it uses as much as digits as its factorization.

221324411421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87687 (or 87675 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

Adding to 221324411421 its reverse (124114423122), we get a palindrome (345438834543).

The spelling of 221324411421 in words is "two hundred twenty-one billion, three hundred twenty-four million, four hundred eleven thousand, four hundred twenty-one".