21113223983 has 2 divisors, whose sum is σ = 21113223984. Its totient is φ = 21113223982.

The previous prime is 21113223979. The next prime is 21113224007. The reversal of 21113223983 is 38932231112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21113223983 - 2² = 21113223979 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113223583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556611991 + 10556611992.

It is an arithmetic number, because the mean of its divisors is an integer number (10556611992).

Almost surely, 2^21113223983 is an apocalyptic number.

21113223983 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113223983 is an equidigital number, since it uses as much as digits as its factorization.

21113223983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The spelling of 21113223983 in words is "twenty-one billion, one hundred thirteen million, two hundred twenty-three thousand, nine hundred eighty-three".