21135335302 has 16 divisors (see below), whose sum is σ = 32247884592. Its totient is φ = 10387333600.

The previous prime is 21135335297. The next prime is 21135335317. The reversal of 21135335302 is 20353353112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290449 + ... + 355852.

It is an arithmetic number, because the mean of its divisors is an integer number (2015492787).

Almost surely, 2^21135335302 is an apocalyptic number.

21135335302 is a deficient number, since it is larger than the sum of its proper divisors (11112549290).

21135335302 is a wasteful number, since it uses less digits than its factorization.

21135335302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646583.

The product of its (nonzero) digits is 8100, while the sum is 28.

Adding to 21135335302 its reverse (20353353112), we get a palindrome (41488688414).

The spelling of 21135335302 in words is "twenty-one billion, one hundred thirty-five million, three hundred thirty-five thousand, three hundred two".