21141242344 has 16 divisors (see below), whose sum is σ = 40048488900. Its totient is φ = 10461645312.

The previous prime is 21141242341. The next prime is 21141242371. The reversal of 21141242344 is 44324214112.

It can be written as a sum of positive squares in 2 ways, for example, as 21109184100 + 32058244 = 145290^2 + 5662^2 .

It is a super-2 number, since 2×21141242344² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21141242341) 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, 13621159 + ... + 13622710.

Almost surely, 2^21141242344 is an apocalyptic number.

It is an amenable number.

21141242344 is a deficient number, since it is larger than the sum of its proper divisors (18907246556).

21141242344 is a wasteful number, since it uses less digits than its factorization.

21141242344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27243972 (or 27243968 counting only the distinct ones).

The product of its digits is 6144, while the sum is 28.

Adding to 21141242344 its reverse (44324214112), we get a palindrome (65465456456).

The spelling of 21141242344 in words is "twenty-one billion, one hundred forty-one million, two hundred forty-two thousand, three hundred forty-four".