21021232212103 has 8 divisors (see below), whose sum is σ = 21855347362800. Its totient is φ = 20202421926720.

The previous prime is 21021232212077. The next prime is 21021232212107. The reversal of 21021232212103 is 30121223212012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21021232212103 - 2³⁷ = 20883793258631 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 (21021232212107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3826213528 + ... + 3826219021.

It is an arithmetic number, because the mean of its divisors is an integer number (2731918420350).

Almost surely, 2^{21021232212103} is an apocalyptic number.

21021232212103 is a deficient number, since it is larger than the sum of its proper divisors (834115150697).

21021232212103 is an equidigital number, since it uses as much as digits as its factorization.

21021232212103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7652432657.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21021232212103 its reverse (30121223212012), we get a palindrome (51142455424115).

Subtracting 21021232212103 from its reverse (30121223212012), we obtain a palindrome (9099990999909).

The spelling of 21021232212103 in words is "twenty-one trillion, twenty-one billion, two hundred thirty-two million, two hundred twelve thousand, one hundred three".