211210102210121 has 4 divisors (see below), whose sum is σ = 241382973954432. Its totient is φ = 181037230465812.

The previous prime is 211210102210061. The next prime is 211210102210139. The reversal of 211210102210121 is 121012201012112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 211210102210121 - 2¹⁴ = 211210102193737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211210102210121.

It is not an unprimeable number, because it can be changed into a prime (211210102210141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15086435872145 + ... + 15086435872158.

It is an arithmetic number, because the mean of its divisors is an integer number (60345743488608).

Almost surely, 2^{211210102210121} is an apocalyptic number.

It is an amenable number.

211210102210121 is a deficient number, since it is larger than the sum of its proper divisors (30172871744311).

211210102210121 is an equidigital number, since it uses as much as digits as its factorization.

211210102210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30172871744310.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 211210102210121 its reverse (121012201012112), we get a palindrome (332222303222233).

The spelling of 211210102210121 in words is "two hundred eleven trillion, two hundred ten billion, one hundred two million, two hundred ten thousand, one hundred twenty-one".