21103152211 has 16 divisors (see below), whose sum is σ = 22349952000. Its totient is φ = 19884953088.

The previous prime is 21103152173. The next prime is 21103152223. The reversal of 21103152211 is 11225130112.

It is a cyclic number.

It is not a de Polignac number, because 21103152211 - 2¹¹ = 21103150163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103152251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 802900 + ... + 828766.

It is an arithmetic number, because the mean of its divisors is an integer number (1396872000).

Almost surely, 2^21103152211 is an apocalyptic number.

21103152211 is a deficient number, since it is larger than the sum of its proper divisors (1246799789).

21103152211 is a wasteful number, since it uses less digits than its factorization.

21103152211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26418.

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 21103152211 its reverse (11225130112), we get a palindrome (32328282323).

The spelling of 21103152211 in words is "twenty-one billion, one hundred three million, one hundred fifty-two thousand, two hundred eleven".