21321120131103 has 16 divisors (see below), whose sum is σ = 30617107189760. Its totient is φ = 13119761255904.

The previous prime is 21321120131099. The next prime is 21321120131119. The reversal of 21321120131103 is 30113102112312.

It is not a de Polignac number, because 21321120131103 - 2² = 21321120131099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21321120131103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321120131503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18775843 + ... + 19878996.

It is an arithmetic number, because the mean of its divisors is an integer number (1913569199360).

Almost surely, 2^{21321120131103} is an apocalyptic number.

21321120131103 is a deficient number, since it is larger than the sum of its proper divisors (9295987058657).

21321120131103 is a wasteful number, since it uses less digits than its factorization.

21321120131103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38668998.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21321120131103 its reverse (30113102112312), we get a palindrome (51434222243415).

The spelling of 21321120131103 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred twenty million, one hundred thirty-one thousand, one hundred three".