21212101122093 has 24 divisors (see below), whose sum is σ = 36859791425600. Its totient is φ = 11483242712064.

The previous prime is 21212101121987. The next prime is 21212101122109. The reversal of 21212101122093 is 39022110121212.

21212101122093 is a `hidden beast` number, since 212 + 1 + 210 + 11 + 220 + 9 + 3 = 666.

It is not a de Polignac number, because 21212101122093 - 2²⁹ = 21211564251181 is a prime.

It is a super-3 number, since 3×21212101122093³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212101122593) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8860525588 + ... + 8860527981.

Almost surely, 2^{21212101122093} is an apocalyptic number.

It is an amenable number.

21212101122093 is a deficient number, since it is larger than the sum of its proper divisors (15647690303507).

21212101122093 is a wasteful number, since it uses less digits than its factorization.

21212101122093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17721053601 (or 17721053598 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The spelling of 21212101122093 in words is "twenty-one trillion, two hundred twelve billion, one hundred one million, one hundred twenty-two thousand, ninety-three".