21111321133303 has 2 divisors, whose sum is σ = 21111321133304. Its totient is φ = 21111321133302.

The previous prime is 21111321133237. The next prime is 21111321133313. The reversal of 21111321133303 is 30333112311112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21111321133303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21111321133313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555660566651 + 10555660566652.

It is an arithmetic number, because the mean of its divisors is an integer number (10555660566652).

Almost surely, 2^{21111321133303} is an apocalyptic number.

21111321133303 is a deficient number, since it is larger than the sum of its proper divisors (1).

21111321133303 is an equidigital number, since it uses as much as digits as its factorization.

21111321133303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 21111321133303 its reverse (30333112311112), we get a palindrome (51444433444415).

The spelling of 21111321133303 in words is "twenty-one trillion, one hundred eleven billion, three hundred twenty-one million, one hundred thirty-three thousand, three hundred three".