202112121005 has 4 divisors (see below), whose sum is σ = 242534545212. Its totient is φ = 161689696800.

The previous prime is 202112120939. The next prime is 202112121017. The reversal of 202112121005 is 500121211202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53333745481 + 148778375524 = 230941^2 + 385718^2 .

It is not a de Polignac number, because 202112121005 - 2¹² = 202112116909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20211212096 + ... + 20211212105.

It is an arithmetic number, because the mean of its divisors is an integer number (60633636303).

Almost surely, 2^202112121005 is an apocalyptic number.

It is an amenable number.

202112121005 is a deficient number, since it is larger than the sum of its proper divisors (40422424207).

202112121005 is an equidigital number, since it uses as much as digits as its factorization.

202112121005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40422424206.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 202112121005 its reverse (500121211202), we get a palindrome (702233332207).

The spelling of 202112121005 in words is "two hundred two billion, one hundred twelve million, one hundred twenty-one thousand, five".