21043031241 has 8 divisors (see below), whose sum is σ = 28058734080. Its totient is φ = 14028007952.

The previous prime is 21043031237. The next prime is 21043031249. The reversal of 21043031241 is 14213034012.

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 21043031241 - 2² = 21043031237 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21043031249) 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, 92610 + ... + 225083.

It is an arithmetic number, because the mean of its divisors is an integer number (3507341760).

Almost surely, 2^21043031241 is an apocalyptic number.

It is an amenable number.

21043031241 is a deficient number, since it is larger than the sum of its proper divisors (7015702839).

21043031241 is a wasteful number, since it uses less digits than its factorization.

21043031241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339775.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21043031241 its reverse (14213034012), we get a palindrome (35256065253).

The spelling of 21043031241 in words is "twenty-one billion, forty-three million, thirty-one thousand, two hundred forty-one".