211002002121 has 4 divisors (see below), whose sum is σ = 281336002832. Its totient is φ = 140668001412.

The previous prime is 211002002119. The next prime is 211002002149. The reversal of 211002002121 is 121200200112.

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 211002002121 - 2¹ = 211002002119 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211002002097 and 211002002106.

It is not an unprimeable number, because it can be changed into a prime (211002002191) 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, 35167000351 + ... + 35167000356.

It is an arithmetic number, because the mean of its divisors is an integer number (70334000708).

Almost surely, 2^211002002121 is an apocalyptic number.

It is an amenable number.

211002002121 is a deficient number, since it is larger than the sum of its proper divisors (70334000711).

211002002121 is an equidigital number, since it uses as much as digits as its factorization.

211002002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70334000710.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 211002002121 its reverse (121200200112), we get a palindrome (332202202233).

The spelling of 211002002121 in words is "two hundred eleven billion, two million, two thousand, one hundred twenty-one".