212123200112121 has 8 divisors (see below), whose sum is σ = 299468047217184. Its totient is φ = 133096909874240.

The previous prime is 212123200112071. The next prime is 212123200112227. The reversal of 212123200112121 is 121211002321212.

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 212123200112121 - 2⁹ = 212123200111609 is a prime.

It is a super-2 number, since 2×212123200112121² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212123200112521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2079639216735 + ... + 2079639216836.

It is an arithmetic number, because the mean of its divisors is an integer number (37433505902148).

Almost surely, 2^{212123200112121} is an apocalyptic number.

It is an amenable number.

212123200112121 is a deficient number, since it is larger than the sum of its proper divisors (87344847105063).

212123200112121 is a wasteful number, since it uses less digits than its factorization.

212123200112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4159278433591.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 212123200112121 its reverse (121211002321212), we get a palindrome (333334202433333).

The spelling of 212123200112121 in words is "two hundred twelve trillion, one hundred twenty-three billion, two hundred million, one hundred twelve thousand, one hundred twenty-one".