2121001012103 has 4 divisors (see below), whose sum is σ = 2122315955448. Its totient is φ = 2119686068760.

The previous prime is 2121001012087. The next prime is 2121001012127. The reversal of 2121001012103 is 3012101001212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2121001012103 - 2⁴ = 2121001012087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121001012303) 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, 657469253 + ... + 657472478.

It is an arithmetic number, because the mean of its divisors is an integer number (530578988862).

Almost surely, 2^{2121001012103} is an apocalyptic number.

2121001012103 is a deficient number, since it is larger than the sum of its proper divisors (1314943345).

2121001012103 is a wasteful number, since it uses less digits than its factorization.

2121001012103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314943344.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 2121001012103 its reverse (3012101001212), we get a palindrome (5133102013315).

The spelling of 2121001012103 in words is "two trillion, one hundred twenty-one billion, one million, twelve thousand, one hundred three".