210200120002121 has 4 divisors (see below), whose sum is σ = 210200156319744. Its totient is φ = 210200083684500.

The previous prime is 210200120002111. The next prime is 210200120002123. The reversal of 210200120002121 is 121200021002012.

210200120002121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210200120002121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210200120002096 and 210200120002105.

It is not an unprimeable number, because it can be changed into a prime (210200120002123) 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, 7320905 + ... + 21771446.

It is an arithmetic number, because the mean of its divisors is an integer number (52550039079936).

Almost surely, 2^{210200120002121} is an apocalyptic number.

It is an amenable number.

210200120002121 is a deficient number, since it is larger than the sum of its proper divisors (36317623).

210200120002121 is an equidigital number, since it uses as much as digits as its factorization.

210200120002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36317622.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 210200120002121 its reverse (121200021002012), we get a palindrome (331400141004133).

The spelling of 210200120002121 in words is "two hundred ten trillion, two hundred billion, one hundred twenty million, two thousand, one hundred twenty-one".