21100222120093 has 4 divisors (see below), whose sum is σ = 21100231410588. Its totient is φ = 21100212829600.

The previous prime is 21100222120079. The next prime is 21100222120139. The reversal of 21100222120093 is 39002122200112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3863418251364 + 17236803868729 = 1965558^2 + 4151723^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21100222120093 is a prime.

It is a super-3 number, since 3×21100222120093³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100922120093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1285455 + ... + 6622147.

It is an arithmetic number, because the mean of its divisors is an integer number (5275057852647).

Almost surely, 2^{21100222120093} is an apocalyptic number.

It is an amenable number.

21100222120093 is a deficient number, since it is larger than the sum of its proper divisors (9290495).

21100222120093 is an equidigital number, since it uses as much as digits as its factorization.

21100222120093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9290494.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 21100222120093 in words is "twenty-one trillion, one hundred billion, two hundred twenty-two million, one hundred twenty thousand, ninety-three".