21010211103 has 32 divisors (see below), whose sum is σ = 32489982976. Its totient is φ = 11828291328.

The previous prime is 21010211083. The next prime is 21010211137. The reversal of 21010211103 is 30111201012.

It is not a de Polignac number, because 21010211103 - 2¹⁷ = 21010080031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010211003) 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 31 ways as a sum of consecutive naturals, for example, 1475325 + ... + 1489497.

It is an arithmetic number, because the mean of its divisors is an integer number (1015311968).

Almost surely, 2^21010211103 is an apocalyptic number.

21010211103 is a deficient number, since it is larger than the sum of its proper divisors (11479771873).

21010211103 is a wasteful number, since it uses less digits than its factorization.

21010211103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15223.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21010211103 its reverse (30111201012), we get a palindrome (51121412115).

The spelling of 21010211103 in words is "twenty-one billion, ten million, two hundred eleven thousand, one hundred three".