210121102121 has 8 divisors (see below), whose sum is σ = 240792733440. Its totient is φ = 179613053568.

The previous prime is 210121102117. The next prime is 210121102129. The reversal of 210121102121 is 121201121012.

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 210121102121 - 2² = 210121102117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210121102096 and 210121102105.

It is not an unprimeable number, because it can be changed into a prime (210121102129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40892936 + ... + 40898073.

It is an arithmetic number, because the mean of its divisors is an integer number (30099091680).

Almost surely, 2^210121102121 is an apocalyptic number.

It is an amenable number.

210121102121 is a deficient number, since it is larger than the sum of its proper divisors (30671631319).

210121102121 is an equidigital number, since it uses as much as digits as its factorization.

210121102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81791383.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 210121102121 its reverse (121201121012), we get a palindrome (331322223133).

The spelling of 210121102121 in words is "two hundred ten billion, one hundred twenty-one million, one hundred two thousand, one hundred twenty-one".