21201244342023 has 16 divisors (see below), whose sum is σ = 30019985030880. Its totient is φ = 13263267526656.

The previous prime is 21201244342013. The next prime is 21201244342063. The reversal of 21201244342023 is 32024344210212.

It is not a de Polignac number, because 21201244342023 - 2¹⁰ = 21201244340999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201244342013) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 616764228 + ... + 616798601.

It is an arithmetic number, because the mean of its divisors is an integer number (1876249064430).

Almost surely, 2^{21201244342023} is an apocalyptic number.

21201244342023 is a deficient number, since it is larger than the sum of its proper divisors (8818740688857).

21201244342023 is a wasteful number, since it uses less digits than its factorization.

21201244342023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233563186.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 21201244342023 its reverse (32024344210212), we get a palindrome (53225588552235).

The spelling of 21201244342023 in words is "twenty-one trillion, two hundred one billion, two hundred forty-four million, three hundred forty-two thousand, twenty-three".