221220032434 has 8 divisors (see below), whose sum is σ = 331856086320. Its totient is φ = 110601336996.

The previous prime is 221220032393. The next prime is 221220032441. The reversal of 221220032434 is 434230022122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 221220032399 and 221220032408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4307704 + ... + 4358755.

It is an arithmetic number, because the mean of its divisors is an integer number (41482010790).

Almost surely, 2^221220032434 is an apocalyptic number.

221220032434 is a deficient number, since it is larger than the sum of its proper divisors (110636053886).

221220032434 is a wasteful number, since it uses less digits than its factorization.

221220032434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8679224.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 221220032434 its reverse (434230022122), we get a palindrome (655450054556).

The spelling of 221220032434 in words is "two hundred twenty-one billion, two hundred twenty million, thirty-two thousand, four hundred thirty-four".