21033100093 has 2 divisors, whose sum is σ = 21033100094. Its totient is φ = 21033100092.

The previous prime is 21033100057. The next prime is 21033100159. The reversal of 21033100093 is 39000133012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15426385209 + 5606714884 = 124203^2 + 74878^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21033100093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21033100493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516550046 + 10516550047.

It is an arithmetic number, because the mean of its divisors is an integer number (10516550047).

Almost surely, 2^21033100093 is an apocalyptic number.

It is an amenable number.

21033100093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033100093 is an equidigital number, since it uses as much as digits as its factorization.

21033100093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 22.

The spelling of 21033100093 in words is "twenty-one billion, thirty-three million, one hundred thousand, ninety-three".