21315104500235 has 16 divisors (see below), whose sum is σ = 31480769724096. Its totient is φ = 13491758452608.

The previous prime is 21315104500213. The next prime is 21315104500243. The reversal of 21315104500235 is 53200540151312.

It is a cyclic number.

It is not a de Polignac number, because 21315104500235 - 2¹⁰ = 21315104499211 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23423191304 + ... + 23423192213.

It is an arithmetic number, because the mean of its divisors is an integer number (1967548107756).

Almost surely, 2^{21315104500235} is an apocalyptic number.

21315104500235 is a deficient number, since it is larger than the sum of its proper divisors (10165665223861).

21315104500235 is a wasteful number, since it uses less digits than its factorization.

21315104500235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46846383542.

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 21315104500235 its reverse (53200540151312), we get a palindrome (74515644651547).

The spelling of 21315104500235 in words is "twenty-one trillion, three hundred fifteen billion, one hundred four million, five hundred thousand, two hundred thirty-five".