221220400433434 has 16 divisors (see below), whose sum is σ = 333685948727520. Its totient is φ = 109991756583280.

The previous prime is 221220400433381. The next prime is 221220400433533. The reversal of 221220400433434 is 434334004022122.

It is a self number, because there is not a number n which added to its sum of digits gives 221220400433434.

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, 82881057 + ... + 85508539.

It is an arithmetic number, because the mean of its divisors is an integer number (20855371795470).

Almost surely, 2^{221220400433434} is an apocalyptic number.

221220400433434 is a deficient number, since it is larger than the sum of its proper divisors (112465548294086).

221220400433434 is a wasteful number, since it uses less digits than its factorization.

221220400433434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2862845.

The product of its (nonzero) digits is 110592, while the sum is 34.

Adding to 221220400433434 its reverse (434334004022122), we get a palindrome (655554404455556).

The spelling of 221220400433434 in words is "two hundred twenty-one trillion, two hundred twenty billion, four hundred million, four hundred thirty-three thousand, four hundred thirty-four".