21121340411103 has 8 divisors (see below), whose sum is σ = 28223410383408. Its totient is φ = 14050082023104.

The previous prime is 21121340411081. The next prime is 21121340411167. The reversal of 21121340411103 is 30111404312112.

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

It is not a de Polignac number, because 21121340411103 - 2¹² = 21121340407007 is a prime.

It is a super-2 number, since 2×21121340411103² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121340411203) 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, 7702894476 + ... + 7702897217.

It is an arithmetic number, because the mean of its divisors is an integer number (3527926297926).

Almost surely, 2^{21121340411103} is an apocalyptic number.

21121340411103 is a deficient number, since it is larger than the sum of its proper divisors (7102069972305).

21121340411103 is a wasteful number, since it uses less digits than its factorization.

21121340411103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15405792153.

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 21121340411103 its reverse (30111404312112), we get a palindrome (51232744723215).

The spelling of 21121340411103 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred forty million, four hundred eleven thousand, one hundred three".