21113103103021 has 8 divisors (see below), whose sum is σ = 21279476234240. Its totient is φ = 20946731975568.

The previous prime is 21113103103019. The next prime is 21113103103087. The reversal of 21113103103021 is 12030130131112.

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 21113103103021 - 2¹ = 21113103103019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21113103103021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113106103021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26268895 + ... + 27060691.

It is an arithmetic number, because the mean of its divisors is an integer number (2659934529280).

Almost surely, 2^{21113103103021} is an apocalyptic number.

It is an amenable number.

21113103103021 is a deficient number, since it is larger than the sum of its proper divisors (166373131219).

21113103103021 is a wasteful number, since it uses less digits than its factorization.

21113103103021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001883.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 21113103103021 its reverse (12030130131112), we get a palindrome (33143233234133).

The spelling of 21113103103021 in words is "twenty-one trillion, one hundred thirteen billion, one hundred three million, one hundred three thousand, twenty-one".