210121202122109 has 8 divisors (see below), whose sum is σ = 210549711492000. Its totient is φ = 209692722452400.

The previous prime is 210121202122081. The next prime is 210121202122127. The reversal of 210121202122109 is 901221202121012.

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 210121202122109 - 2²⁴ = 210121185344893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121202122129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6766499 + ... + 21587679.

It is an arithmetic number, because the mean of its divisors is an integer number (26318713936500).

Almost surely, 2^{210121202122109} is an apocalyptic number.

It is an amenable number.

210121202122109 is a deficient number, since it is larger than the sum of its proper divisors (428509369891).

210121202122109 is a wasteful number, since it uses less digits than its factorization.

210121202122109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14850091.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 210121202122109 in words is "two hundred ten trillion, one hundred twenty-one billion, two hundred two million, one hundred twenty-two thousand, one hundred nine".