21111321131303 has 4 divisors (see below), whose sum is σ = 22735268910648. Its totient is φ = 19487373351960.

The previous prime is 21111321131297. The next prime is 21111321131311. The reversal of 21111321131303 is 30313112311112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21111321131303 - 2¹⁶ = 21111321065767 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 (21111321133303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 811973889653 + ... + 811973889678.

It is an arithmetic number, because the mean of its divisors is an integer number (5683817227662).

Almost surely, 2^{21111321131303} is an apocalyptic number.

21111321131303 is a deficient number, since it is larger than the sum of its proper divisors (1623947779345).

21111321131303 is a wasteful number, since it uses less digits than its factorization.

21111321131303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623947779344.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 21111321131303 its reverse (30313112311112), we get a palindrome (51424433442415).

The spelling of 21111321131303 in words is "twenty-one trillion, one hundred eleven billion, three hundred twenty-one million, one hundred thirty-one thousand, three hundred three".