10002121200121 has 4 divisors (see below), whose sum is σ = 10002308914000. Its totient is φ = 10001933486244.

The previous prime is 10002121200083. The next prime is 10002121200157. The reversal of 10002121200121 is 12100212120001.

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 10002121200121 - 2²⁵ = 10002087645689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10002121210121) 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, 93776991 + ... + 93883588.

It is an arithmetic number, because the mean of its divisors is an integer number (2500577228500).

Almost surely, 2^{10002121200121} is an apocalyptic number.

It is an amenable number.

10002121200121 is a deficient number, since it is larger than the sum of its proper divisors (187713879).

10002121200121 is an equidigital number, since it uses as much as digits as its factorization.

10002121200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187713878.

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

Adding to 10002121200121 its reverse (12100212120001), we get a palindrome (22102333320122).

The spelling of 10002121200121 in words is "ten trillion, two billion, one hundred twenty-one million, two hundred thousand, one hundred twenty-one".