21405222322235 has 16 divisors (see below), whose sum is σ = 25848599469600. Its totient is φ = 17015994673920.

The previous prime is 21405222322223. The next prime is 21405222322259. The reversal of 21405222322235 is 53222322250412.

It is not a de Polignac number, because 21405222322235 - 2⁴ = 21405222322219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21405222322195 and 21405222322204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2030945 + ... + 6850925.

It is an arithmetic number, because the mean of its divisors is an integer number (1615537466850).

Almost surely, 2^{21405222322235} is an apocalyptic number.

21405222322235 is a deficient number, since it is larger than the sum of its proper divisors (4443377147365).

21405222322235 is a wasteful number, since it uses less digits than its factorization.

21405222322235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4825598.

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 21405222322235 its reverse (53222322250412), we get a palindrome (74627544572647).

The spelling of 21405222322235 in words is "twenty-one trillion, four hundred five billion, two hundred twenty-two million, three hundred twenty-two thousand, two hundred thirty-five".