221221213043 has 8 divisors (see below), whose sum is σ = 228014665056. Its totient is φ = 214529918400.

The previous prime is 221221213033. The next prime is 221221213051. The reversal of 221221213043 is 340312122122.

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

It is a cyclic number.

It is not a de Polignac number, because 221221213043 - 2¹⁰ = 221221212019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221221213033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25534946 + ... + 25543607.

It is an arithmetic number, because the mean of its divisors is an integer number (28501833132).

Almost surely, 2^221221213043 is an apocalyptic number.

221221213043 is a deficient number, since it is larger than the sum of its proper divisors (6793452013).

221221213043 is an equidigital number, since it uses as much as digits as its factorization.

221221213043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51078685.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 221221213043 its reverse (340312122122), we get a palindrome (561533335165).

The spelling of 221221213043 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred thirteen thousand, forty-three".