21225102640105 has 16 divisors (see below), whose sum is σ = 31347843899904. Its totient is φ = 13434790242240.

The previous prime is 21225102640057. The next prime is 21225102640177. The reversal of 21225102640105 is 50104620152212.

It is not a de Polignac number, because 21225102640105 - 2¹¹ = 21225102638057 is a prime.

It is a super-2 number, since 2×21225102640105² (a number of 27 digits) contains 22 as substring.

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, 23324288161 + ... + 23324289070.

It is an arithmetic number, because the mean of its divisors is an integer number (1959240243744).

Almost surely, 2^{21225102640105} is an apocalyptic number.

It is an amenable number.

21225102640105 is a deficient number, since it is larger than the sum of its proper divisors (10122741259799).

21225102640105 is a wasteful number, since it uses less digits than its factorization.

21225102640105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46648577256.

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 21225102640105 its reverse (50104620152212), we get a palindrome (71329722792317).

The spelling of 21225102640105 in words is "twenty-one trillion, two hundred twenty-five billion, one hundred two million, six hundred forty thousand, one hundred five".