221434341420 has 24 divisors (see below), whose sum is σ = 620016156144. Its totient is φ = 59049157696.

The previous prime is 221434341419. The next prime is 221434341451. The reversal of 221434341420 is 24143434122.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1845286119 + ... + 1845286238.

It is an arithmetic number, because the mean of its divisors is an integer number (25834006506).

Almost surely, 2^221434341420 is an apocalyptic number.

221434341420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221434341420 is an abundant number, since it is smaller than the sum of its proper divisors (398581814724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221434341420 is a wasteful number, since it uses less digits than its factorization.

221434341420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690572369 (or 3690572367 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 221434341420 its reverse (24143434122), we get a palindrome (245577775542).

The spelling of 221434341420 in words is "two hundred twenty-one billion, four hundred thirty-four million, three hundred forty-one thousand, four hundred twenty".