210212210121 has 8 divisors (see below), whose sum is σ = 280351341600. Its totient is φ = 140107276032.

The previous prime is 210212210101. The next prime is 210212210237. The reversal of 210212210121 is 121012212012.

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

It is not a de Polignac number, because 210212210121 - 2¹³ = 210212201929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210212210121.

It is not an unprimeable number, because it can be changed into a prime (210212210101) 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, 8535000 + ... + 8559593.

It is an arithmetic number, because the mean of its divisors is an integer number (35043917700).

Almost surely, 2^210212210121 is an apocalyptic number.

It is an amenable number.

210212210121 is a deficient number, since it is larger than the sum of its proper divisors (70139131479).

210212210121 is a wasteful number, since it uses less digits than its factorization.

210212210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17098695.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210212210121 its reverse (121012212012), we get a palindrome (331224422133).

The spelling of 210212210121 in words is "two hundred ten billion, two hundred twelve million, two hundred ten thousand, one hundred twenty-one".