210021210102121 has 8 divisors (see below), whose sum is σ = 230863009579488. Its totient is φ = 189470904324000.

The previous prime is 210021210102089. The next prime is 210021210102131. The reversal of 210021210102121 is 121201012120012.

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 210021210102121 - 2⁵ = 210021210102089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210021210102095 and 210021210102104.

It is not an unprimeable number, because it can be changed into a prime (210021210102131) 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, 72873423300 + ... + 72873426181.

It is an arithmetic number, because the mean of its divisors is an integer number (28857876197436).

Almost surely, 2^{210021210102121} is an apocalyptic number.

It is an amenable number.

210021210102121 is a deficient number, since it is larger than the sum of its proper divisors (20841799477367).

210021210102121 is a wasteful number, since it uses less digits than its factorization.

210021210102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145746849623.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 210021210102121 its reverse (121201012120012), we get a palindrome (331222222222133).

The spelling of 210021210102121 in words is "two hundred ten trillion, twenty-one billion, two hundred ten million, one hundred two thousand, one hundred twenty-one".