2100121013 has 8 divisors (see below), whose sum is σ = 2137003968. Its totient is φ = 2063457504.

The previous prime is 2100121003. The next prime is 2100121021. The reversal of 2100121013 is 3101210012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100121013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2100120985 and 2100121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100121003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35495 + ... + 73892.

It is an arithmetic number, because the mean of its divisors is an integer number (267125496).

Almost surely, 2^2100121013 is an apocalyptic number.

It is an amenable number.

2100121013 is a deficient number, since it is larger than the sum of its proper divisors (36882955).

2100121013 is a wasteful number, since it uses less digits than its factorization.

2100121013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109723.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2100121013 is about 45827.0772906150. The cubic root of 2100121013 is about 1280.6037624081.

Adding to 2100121013 its reverse (3101210012), we get a palindrome (5201331025).

The spelling of 2100121013 in words is "two billion, one hundred million, one hundred twenty-one thousand, thirteen".