21153324241 has 8 divisors (see below), whose sum is σ = 24176839680. Its totient is φ = 18130211808.

The previous prime is 21153324223. The next prime is 21153324259. The reversal of 21153324241 is 14242335112.

It is an interprime number because it is at equal distance from previous prime (21153324223) and next prime (21153324259).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21153324241 - 2¹⁷ = 21153193169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21153324341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21645 + ... + 206821.

It is an arithmetic number, because the mean of its divisors is an integer number (3022104960).

Almost surely, 2^21153324241 is an apocalyptic number.

It is an amenable number.

21153324241 is a deficient number, since it is larger than the sum of its proper divisors (3023515439).

21153324241 is a wasteful number, since it uses less digits than its factorization.

21153324241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201503.

The product of its digits is 5760, while the sum is 28.

Adding to 21153324241 its reverse (14242335112), we get a palindrome (35395659353).

The spelling of 21153324241 in words is "twenty-one billion, one hundred fifty-three million, three hundred twenty-four thousand, two hundred forty-one".