43021100442442 has 4 divisors (see below), whose sum is σ = 64531650663666. Its totient is φ = 21510550221220.

The previous prime is 43021100442371. The next prime is 43021100442457. The reversal of 43021100442442 is 24424400112034.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 37112841704961 + 5908258737481 = 6092031^2 + 2430691^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10755275110609 + ... + 10755275110612.

Almost surely, 2^{43021100442442} is an apocalyptic number.

43021100442442 is a deficient number, since it is larger than the sum of its proper divisors (21510550221224).

43021100442442 is a wasteful number, since it uses less digits than its factorization.

43021100442442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21510550221223.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 43021100442442 its reverse (24424400112034), we get a palindrome (67445500554476).

The spelling of 43021100442442 in words is "forty-three trillion, twenty-one billion, one hundred million, four hundred forty-two thousand, four hundred forty-two".