221034143420 has 24 divisors (see below), whose sum is σ = 464203383504. Its totient is φ = 88407622656.

The previous prime is 221034143419. The next prime is 221034143437. The reversal of 221034143420 is 24341430122.

It is a self number, because there is not a number n which added to its sum of digits gives 221034143420.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70757 + ... + 668636.

It is an arithmetic number, because the mean of its divisors is an integer number (19341807646).

Almost surely, 2^221034143420 is an apocalyptic number.

221034143420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221034143420 is an abundant number, since it is smaller than the sum of its proper divisors (243169240084).

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

221034143420 is a wasteful number, since it uses less digits than its factorization.

221034143420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754349 (or 754347 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 221034143420 its reverse (24341430122), we get a palindrome (245375573542).

The spelling of 221034143420 in words is "two hundred twenty-one billion, thirty-four million, one hundred forty-three thousand, four hundred twenty".