21010533041 has 4 divisors (see below), whose sum is σ = 21041752932. Its totient is φ = 20979313152.

The previous prime is 21010532993. The next prime is 21010533059. The reversal of 21010533041 is 14033501012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14844985600 + 6165547441 = 121840^2 + 78521^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21010533041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010533091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15608936 + ... + 15610281.

It is an arithmetic number, because the mean of its divisors is an integer number (5260438233).

Almost surely, 2^21010533041 is an apocalyptic number.

It is an amenable number.

21010533041 is a deficient number, since it is larger than the sum of its proper divisors (31219891).

21010533041 is an equidigital number, since it uses as much as digits as its factorization.

21010533041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31219890.

The product of its (nonzero) digits is 360, while the sum is 20.

The spelling of 21010533041 in words is "twenty-one billion, ten million, five hundred thirty-three thousand, forty-one".