2101121212103 has 2 divisors, whose sum is σ = 2101121212104. Its totient is φ = 2101121212102.

The previous prime is 2101121212093. The next prime is 2101121212133. The reversal of 2101121212103 is 3012121211012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2101121212103 - 2¹² = 2101121208007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2101121212133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050560606051 + 1050560606052.

It is an arithmetic number, because the mean of its divisors is an integer number (1050560606052).

Almost surely, 2^{2101121212103} is an apocalyptic number.

2101121212103 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101121212103 is an equidigital number, since it uses as much as digits as its factorization.

2101121212103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2101121212103 its reverse (3012121211012), we get a palindrome (5113242423115).

The spelling of 2101121212103 in words is "two trillion, one hundred one billion, one hundred twenty-one million, two hundred twelve thousand, one hundred three".