21101099983 has 2 divisors, whose sum is σ = 21101099984. Its totient is φ = 21101099982.

The previous prime is 21101099977. The next prime is 21101099989. The reversal of 21101099983 is 38999010112.

It is a balanced prime because it is at equal distance from previous prime (21101099977) and next prime (21101099989).

It is a cyclic number.

It is not a de Polignac number, because 21101099983 - 2⁹ = 21101099471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21101099989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550549991 + 10550549992.

It is an arithmetic number, because the mean of its divisors is an integer number (10550549992).

Almost surely, 2^21101099983 is an apocalyptic number.

21101099983 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101099983 is an equidigital number, since it uses as much as digits as its factorization.

21101099983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 43.

The spelling of 21101099983 in words is "twenty-one billion, one hundred one million, ninety-nine thousand, nine hundred eighty-three".