21010120222109 has 8 divisors (see below), whose sum is σ = 21015290942688. Its totient is φ = 21004949805840.

The previous prime is 21010120221949. The next prime is 21010120222139. The reversal of 21010120222109 is 90122202101012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21010120222109 - 2²⁴ = 21010103444893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010120222139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200661479 + ... + 200766155.

It is an arithmetic number, because the mean of its divisors is an integer number (2626911367836).

Almost surely, 2^{21010120222109} is an apocalyptic number.

It is an amenable number.

21010120222109 is a deficient number, since it is larger than the sum of its proper divisors (5170720579).

21010120222109 is a wasteful number, since it uses less digits than its factorization.

21010120222109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152155.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 21010120222109 in words is "twenty-one trillion, ten billion, one hundred twenty million, two hundred twenty-two thousand, one hundred nine".