21241204023 has 16 divisors (see below), whose sum is σ = 30590714336. Its totient is φ = 13032714240.

The previous prime is 21241203989. The next prime is 21241204063. The reversal of 21241204023 is 32040214212.

It is not a de Polignac number, because 21241204023 - 2⁶ = 21241203959 is a prime.

It is a super-2 number, since 2×21241204023² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241204063) 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 15 ways as a sum of consecutive naturals, for example, 794938 + ... + 821223.

It is an arithmetic number, because the mean of its divisors is an integer number (1911919646).

Almost surely, 2^21241204023 is an apocalyptic number.

21241204023 is a deficient number, since it is larger than the sum of its proper divisors (9349510313).

21241204023 is a wasteful number, since it uses less digits than its factorization.

21241204023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616514.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21241204023 its reverse (32040214212), we get a palindrome (53281418235).

The spelling of 21241204023 in words is "twenty-one billion, two hundred forty-one million, two hundred four thousand, twenty-three".