202110122109 has 16 divisors (see below), whose sum is σ = 308047132800. Its totient is φ = 115465321920.

The previous prime is 202110122107. The next prime is 202110122111. The reversal of 202110122109 is 901221011202.

It is an interprime number because it is at equal distance from previous prime (202110122107) and next prime (202110122111).

It is not a de Polignac number, because 202110122109 - 2¹ = 202110122107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202110122101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 995634 + ... + 1181315.

It is an arithmetic number, because the mean of its divisors is an integer number (19252945800).

Almost surely, 2^202110122109 is an apocalyptic number.

It is an amenable number.

202110122109 is a deficient number, since it is larger than the sum of its proper divisors (105937010691).

202110122109 is a wasteful number, since it uses less digits than its factorization.

202110122109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181380.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 202110122109 in words is "two hundred two billion, one hundred ten million, one hundred twenty-two thousand, one hundred nine".