21060542241 has 8 divisors (see below), whose sum is σ = 31200803360. Its totient is φ = 14040361476.

The previous prime is 21060542233. The next prime is 21060542281. The reversal of 21060542241 is 14224506012.

21060542241 is a `hidden beast` number, since 2 + 10 + 605 + 4 + 2 + 2 + 41 = 666.

It is not a de Polignac number, because 21060542241 - 2³ = 21060542233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 780020083 = 21060542241 / (2 + 1 + 0 + 6 + 0 + 5 + 4 + 2 + 2 + 4 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21060542231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390010015 + ... + 390010068.

It is an arithmetic number, because the mean of its divisors is an integer number (3900100420).

Almost surely, 2^21060542241 is an apocalyptic number.

It is an amenable number.

21060542241 is a deficient number, since it is larger than the sum of its proper divisors (10140261119).

21060542241 is an equidigital number, since it uses as much as digits as its factorization.

21060542241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780020092 (or 780020086 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The spelling of 21060542241 in words is "twenty-one billion, sixty million, five hundred forty-two thousand, two hundred forty-one".