21020122093 has 2 divisors, whose sum is σ = 21020122094. Its totient is φ = 21020122092.

The previous prime is 21020122069. The next prime is 21020122129. The reversal of 21020122093 is 39022102012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19055593764 + 1964528329 = 138042^2 + 44323^2 .

It is a cyclic number.

It is not a de Polignac number, because 21020122093 - 2¹³ = 21020113901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21020122063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510061046 + 10510061047.

It is an arithmetic number, because the mean of its divisors is an integer number (10510061047).

Almost surely, 2^21020122093 is an apocalyptic number.

It is an amenable number.

21020122093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020122093 is an equidigital number, since it uses as much as digits as its factorization.

21020122093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 21020122093 in words is "twenty-one billion, twenty million, one hundred twenty-two thousand, ninety-three".