21012102122093 has 2 divisors, whose sum is σ = 21012102122094. Its totient is φ = 21012102122092.

The previous prime is 21012102122069. The next prime is 21012102122149. The reversal of 21012102122093 is 39022120121012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11592131897284 + 9419970224809 = 3404722^2 + 3069197^2 .

It is a cyclic number.

It is not a de Polignac number, because 21012102122093 - 2⁶ = 21012102122029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21012102122393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506051061046 + 10506051061047.

It is an arithmetic number, because the mean of its divisors is an integer number (10506051061047).

Almost surely, 2^{21012102122093} is an apocalyptic number.

It is an amenable number.

21012102122093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012102122093 is an equidigital number, since it uses as much as digits as its factorization.

21012102122093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 21012102122093 in words is "twenty-one trillion, twelve billion, one hundred two million, one hundred twenty-two thousand, ninety-three".