221434312042 has 8 divisors (see below), whose sum is σ = 335883507300. Its totient is φ = 109473142944.

The previous prime is 221434312019. The next prime is 221434312051. The reversal of 221434312042 is 240213434122.

It can be written as a sum of positive squares in 2 ways, for example, as 192360310921 + 29074001121 = 438589^2 + 170511^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 221434312042.

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, 622006317 + ... + 622006672.

Almost surely, 2^221434312042 is an apocalyptic number.

221434312042 is a deficient number, since it is larger than the sum of its proper divisors (114449195258).

221434312042 is a wasteful number, since it uses less digits than its factorization.

221434312042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244013080.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 221434312042 its reverse (240213434122), we get a palindrome (461647746164).

The spelling of 221434312042 in words is "two hundred twenty-one billion, four hundred thirty-four million, three hundred twelve thousand, forty-two".