21135035522 has 16 divisors (see below), whose sum is σ = 32455626720. Its totient is φ = 10316732832.

The previous prime is 21135035521. The next prime is 21135035557. The reversal of 21135035522 is 22553053112.

It is not an unprimeable number, because it can be changed into a prime (21135035521) 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, 120833 + ... + 238475.

It is an arithmetic number, because the mean of its divisors is an integer number (2028476670).

Almost surely, 2^21135035522 is an apocalyptic number.

21135035522 is a deficient number, since it is larger than the sum of its proper divisors (11320591198).

21135035522 is a wasteful number, since it uses less digits than its factorization.

21135035522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119777.

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 21135035522 its reverse (22553053112), we get a palindrome (43688088634).

The spelling of 21135035522 in words is "twenty-one billion, one hundred thirty-five million, thirty-five thousand, five hundred twenty-two".