10000121212001 has 4 divisors (see below), whose sum is σ = 10002485870100. Its totient is φ = 9997756553904.

The previous prime is 10000121211991. The next prime is 10000121212061. The reversal of 10000121212001 is 10021212100001.

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 4950892003600 + 5049229208401 = 2225060^2 + 2247049^2 .

It is a cyclic number.

It is not a de Polignac number, because 10000121212001 - 2⁶ = 10000121211937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10000121212061) 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, 1182322706 + ... + 1182331163.

It is an arithmetic number, because the mean of its divisors is an integer number (2500621467525).

Almost surely, 2^{10000121212001} is an apocalyptic number.

It is an amenable number.

10000121212001 is a deficient number, since it is larger than the sum of its proper divisors (2364658099).

10000121212001 is an equidigital number, since it uses as much as digits as its factorization.

10000121212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2364658098.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10000121212001 its reverse (10021212100001), we get a palindrome (20021333312002).

The spelling of 10000121212001 in words is "ten trillion, one hundred twenty-one million, two hundred twelve thousand, one".