21141230243 has 16 divisors (see below), whose sum is σ = 25591002624. Its totient is φ = 17049552000.

The previous prime is 21141230233. The next prime is 21141230249. The reversal of 21141230243 is 34203214112.

It is a cyclic number.

It is not a de Polignac number, because 21141230243 - 2⁸ = 21141229987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21141230249) 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, 359546 + ... + 414192.

It is an arithmetic number, because the mean of its divisors is an integer number (1599437664).

Almost surely, 2^21141230243 is an apocalyptic number.

21141230243 is a deficient number, since it is larger than the sum of its proper divisors (4449772381).

21141230243 is a wasteful number, since it uses less digits than its factorization.

21141230243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57922.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21141230243 its reverse (34203214112), we get a palindrome (55344444355).

The spelling of 21141230243 in words is "twenty-one billion, one hundred forty-one million, two hundred thirty thousand, two hundred forty-three".