221312040043 has 8 divisors (see below), whose sum is σ = 224023942800. Its totient is φ = 218601220608.

The previous prime is 221312039987. The next prime is 221312040097. The reversal of 221312040043 is 340040213122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221312040043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221312039996 and 221312040023.

It is not an unprimeable number, because it can be changed into a prime (221312041043) 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, 144123 + ... + 680731.

It is an arithmetic number, because the mean of its divisors is an integer number (28002992850).

Almost surely, 2^221312040043 is an apocalyptic number.

221312040043 is a deficient number, since it is larger than the sum of its proper divisors (2711902757).

221312040043 is an equidigital number, since it uses as much as digits as its factorization.

221312040043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541661.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 221312040043 its reverse (340040213122), we get a palindrome (561352253165).

The spelling of 221312040043 in words is "two hundred twenty-one billion, three hundred twelve million, forty thousand, forty-three".