21122502135535 has 8 divisors (see below), whose sum is σ = 25347032116416. Its totient is φ = 16897982005920.

The previous prime is 21122502135529. The next prime is 21122502135563. The reversal of 21122502135535 is 53553120522112.

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

It is not a de Polignac number, because 21122502135535 - 2⁵ = 21122502135503 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21122502135494 and 21122502135503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3620170 + ... + 7439800.

It is an arithmetic number, because the mean of its divisors is an integer number (3168379014552).

Almost surely, 2^{21122502135535} is an apocalyptic number.

21122502135535 is a deficient number, since it is larger than the sum of its proper divisors (4224529980881).

21122502135535 is a wasteful number, since it uses less digits than its factorization.

21122502135535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4925633.

The product of its (nonzero) digits is 90000, while the sum is 37.

Adding to 21122502135535 its reverse (53553120522112), we get a palindrome (74675622657647).

The spelling of 21122502135535 in words is "twenty-one trillion, one hundred twenty-two billion, five hundred two million, one hundred thirty-five thousand, five hundred thirty-five".