21522503011 has 4 divisors (see below), whose sum is σ = 21592609192. Its totient is φ = 21452396832.

The previous prime is 21522502999. The next prime is 21522503029. The reversal of 21522503011 is 11030522512.

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

It is a cyclic number.

It is not a de Polignac number, because 21522503011 - 2⁹ = 21522502499 is a prime.

It is a super-2 number, since 2×21522503011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21522503311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35052630 + ... + 35053243.

It is an arithmetic number, because the mean of its divisors is an integer number (5398152298).

Almost surely, 2^21522503011 is an apocalyptic number.

21522503011 is a deficient number, since it is larger than the sum of its proper divisors (70106181).

21522503011 is an equidigital number, since it uses as much as digits as its factorization.

21522503011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70106180.

The product of its (nonzero) digits is 600, while the sum is 22.

The spelling of 21522503011 in words is "twenty-one billion, five hundred twenty-two million, five hundred three thousand, eleven".