22021012043 has 4 divisors (see below), whose sum is σ = 22022457288. Its totient is φ = 22019566800.

The previous prime is 22021011983. The next prime is 22021012049. The reversal of 22021012043 is 34021012022.

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

It is a cyclic number.

It is not a de Polignac number, because 22021012043 - 2⁸ = 22021011787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22021012049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699521 + ... + 730322.

It is an arithmetic number, because the mean of its divisors is an integer number (5505614322).

Almost surely, 2^22021012043 is an apocalyptic number.

22021012043 is a deficient number, since it is larger than the sum of its proper divisors (1445245).

22021012043 is a wasteful number, since it uses less digits than its factorization.

22021012043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445244.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 22021012043 its reverse (34021012022), we get a palindrome (56042024065).

The spelling of 22021012043 in words is "twenty-two billion, twenty-one million, twelve thousand, forty-three".