21522541011 has 8 divisors (see below), whose sum is σ = 28713984000. Its totient is φ = 14339729352.

The previous prime is 21522541003. The next prime is 21522541031. The reversal of 21522541011 is 11014522512.

It is a happy number.

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

It is not a de Polignac number, because 21522541011 - 2³ = 21522541003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21522541031) 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, 2152011 + ... + 2161988.

It is an arithmetic number, because the mean of its divisors is an integer number (3589248000).

Almost surely, 2^21522541011 is an apocalyptic number.

21522541011 is a deficient number, since it is larger than the sum of its proper divisors (7191442989).

21522541011 is a wasteful number, since it uses less digits than its factorization.

21522541011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4315665.

The product of its (nonzero) digits is 800, while the sum is 24.

The spelling of 21522541011 in words is "twenty-one billion, five hundred twenty-two million, five hundred forty-one thousand, eleven".