210200112121 has 4 divisors (see below), whose sum is σ = 210219476644. Its totient is φ = 210180747600.

The previous prime is 210200112119. The next prime is 210200112137. The reversal of 210200112121 is 121211002012.

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 163539360000 + 46660752121 = 404400^2 + 216011^2 .

It is a cyclic number.

It is not a de Polignac number, because 210200112121 - 2¹ = 210200112119 is a prime.

It is a super-2 number, since 2×210200112121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210200115121) 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, 9665970 + ... + 9687691.

It is an arithmetic number, because the mean of its divisors is an integer number (52554869161).

Almost surely, 2^210200112121 is an apocalyptic number.

It is an amenable number.

210200112121 is a deficient number, since it is larger than the sum of its proper divisors (19364523).

210200112121 is a wasteful number, since it uses less digits than its factorization.

210200112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19364522.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210200112121 its reverse (121211002012), we get a palindrome (331411114133).

The spelling of 210200112121 in words is "two hundred ten billion, two hundred million, one hundred twelve thousand, one hundred twenty-one".