21031320030983 has 2 divisors, whose sum is σ = 21031320030984. Its totient is φ = 21031320030982.

The previous prime is 21031320030979. The next prime is 21031320031147. The reversal of 21031320030983 is 38903002313012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21031320030983 - 2² = 21031320030979 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21031326030983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515660015491 + 10515660015492.

It is an arithmetic number, because the mean of its divisors is an integer number (10515660015492).

Almost surely, 2^{21031320030983} is an apocalyptic number.

21031320030983 is a deficient number, since it is larger than the sum of its proper divisors (1).

21031320030983 is an equidigital number, since it uses as much as digits as its factorization.

21031320030983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

Adding to 21031320030983 its reverse (38903002313012), we get a palindrome (59934322343995).

The spelling of 21031320030983 in words is "twenty-one trillion, thirty-one billion, three hundred twenty million, thirty thousand, nine hundred eighty-three".