210212101122121 has 8 divisors (see below), whose sum is σ = 250687723077504. Its totient is φ = 172347809615520.

The previous prime is 210212101122109. The next prime is 210212101122131. The reversal of 210212101122121 is 121221101212012.

It is a happy number.

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

It is not a de Polignac number, because 210212101122121 - 2⁹ = 210212101121609 is a prime.

It is a super-3 number, since 3×210212101122121³ (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 (210212101122131) 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, 652832612020 + ... + 652832612341.

It is an arithmetic number, because the mean of its divisors is an integer number (31335965384688).

Almost surely, 2^{210212101122121} is an apocalyptic number.

It is an amenable number.

210212101122121 is a deficient number, since it is larger than the sum of its proper divisors (40475621955383).

210212101122121 is a wasteful number, since it uses less digits than its factorization.

210212101122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305665224391.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 210212101122121 its reverse (121221101212012), we get a palindrome (331433202334133).

The spelling of 210212101122121 in words is "two hundred ten trillion, two hundred twelve billion, one hundred one million, one hundred twenty-two thousand, one hundred twenty-one".