21152330241 has 48 divisors (see below), whose sum is σ = 34607554560. Its totient is φ = 11426637600.

The previous prime is 21152330233. The next prime is 21152330261. The reversal of 21152330241 is 14203325112.

It is not a de Polignac number, because 21152330241 - 2³ = 21152330233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21152330261) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1352416 + ... + 1367966.

It is an arithmetic number, because the mean of its divisors is an integer number (720990720).

Almost surely, 2^21152330241 is an apocalyptic number.

21152330241 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21152330241 is a deficient number, since it is larger than the sum of its proper divisors (13455224319).

21152330241 is a wasteful number, since it uses less digits than its factorization.

21152330241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16074 (or 16067 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 21152330241 its reverse (14203325112), we get a palindrome (35355655353).

The spelling of 21152330241 in words is "twenty-one billion, one hundred fifty-two million, three hundred thirty thousand, two hundred forty-one".