210204201103121 has 4 divisors (see below), whose sum is σ = 210689661152292. Its totient is φ = 209718741053952.

The previous prime is 210204201103079. The next prime is 210204201103129. The reversal of 210204201103121 is 121301102402012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8221437963025 + 201982763140096 = 2867305^2 + 14212064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210204201103121 is a prime.

It is a super-2 number, since 2×210204201103121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210204201103093 and 210204201103102.

It is not an unprimeable number, because it can be changed into a prime (210204201103129) 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, 242730023936 + ... + 242730024801.

It is an arithmetic number, because the mean of its divisors is an integer number (52672415288073).

Almost surely, 2^{210204201103121} is an apocalyptic number.

It is an amenable number.

210204201103121 is a deficient number, since it is larger than the sum of its proper divisors (485460049171).

210204201103121 is an equidigital number, since it uses as much as digits as its factorization.

210204201103121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485460049170.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 210204201103121 its reverse (121301102402012), we get a palindrome (331505303505133).

The spelling of 210204201103121 in words is "two hundred ten trillion, two hundred four billion, two hundred one million, one hundred three thousand, one hundred twenty-one".