210002112020121 has 4 divisors (see below), whose sum is σ = 280002816026832. Its totient is φ = 140001408013412.

The previous prime is 210002112020117. The next prime is 210002112020287. The reversal of 210002112020121 is 121020211200012.

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 not a de Polignac number, because 210002112020121 - 2² = 210002112020117 is a prime.

It is a super-2 number, since 2×210002112020121² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 210002112020121.

It is not an unprimeable number, because it can be changed into a prime (210002112020101) 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, 35000352003351 + ... + 35000352003356.

It is an arithmetic number, because the mean of its divisors is an integer number (70000704006708).

Almost surely, 2^{210002112020121} is an apocalyptic number.

It is an amenable number.

210002112020121 is a deficient number, since it is larger than the sum of its proper divisors (70000704006711).

210002112020121 is an equidigital number, since it uses as much as digits as its factorization.

210002112020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70000704006710.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210002112020121 its reverse (121020211200012), we get a palindrome (331022323220133).

The spelling of 210002112020121 in words is "two hundred ten trillion, two billion, one hundred twelve million, twenty thousand, one hundred twenty-one".