21020221211103 has 6 divisors (see below), whose sum is σ = 30362541749384. Its totient is φ = 14013480807396.

The previous prime is 21020221211071. The next prime is 21020221211117. The reversal of 21020221211103 is 30111212202012.

21020221211103 is a `hidden beast` number, since 210 + 20 + 221 + 211 + 1 + 0 + 3 = 666.

It is not a de Polignac number, because 21020221211103 - 2⁵ = 21020221211071 is a prime.

It is a super-3 number, since 3×21020221211103³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020221216103) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1167790067275 + ... + 1167790067292.

Almost surely, 2^{21020221211103} is an apocalyptic number.

21020221211103 is a deficient number, since it is larger than the sum of its proper divisors (9342320538281).

21020221211103 is a wasteful number, since it uses less digits than its factorization.

21020221211103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335580134573 (or 2335580134570 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21020221211103 its reverse (30111212202012), we get a palindrome (51131433413115).

Subtracting 21020221211103 from its reverse (30111212202012), we obtain a palindrome (9090990990909).

The spelling of 21020221211103 in words is "twenty-one trillion, twenty billion, two hundred twenty-one million, two hundred eleven thousand, one hundred three".