210021012000121 has 8 divisors (see below), whose sum is σ = 240024113603840. Its totient is φ = 180017935368768.

The previous prime is 210021012000119. The next prime is 210021012000139. The reversal of 210021012000121 is 121000210120012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 210021012000121 - 2¹ = 210021012000119 is a prime.

It is a super-3 number, since 3×210021012000121³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210021012000221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18113665 + ... + 27352273.

It is an arithmetic number, because the mean of its divisors is an integer number (30003014200480).

Almost surely, 2^{210021012000121} is an apocalyptic number.

It is an amenable number.

210021012000121 is a deficient number, since it is larger than the sum of its proper divisors (30003101603719).

210021012000121 is an equidigital number, since it uses as much as digits as its factorization.

210021012000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12486183.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210021012000121 its reverse (121000210120012), we get a palindrome (331021222120133).

The spelling of 210021012000121 in words is "two hundred ten trillion, twenty-one billion, twelve million, one hundred twenty-one", and thus it is an aban number.