21121002144103 has 2 divisors, whose sum is σ = 21121002144104. Its totient is φ = 21121002144102.

The previous prime is 21121002144097. The next prime is 21121002144113. The reversal of 21121002144103 is 30144120012112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21121002144103 - 2⁵ = 21121002144071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21121002144113) 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, 10560501072051 + 10560501072052.

It is an arithmetic number, because the mean of its divisors is an integer number (10560501072052).

Almost surely, 2^{21121002144103} is an apocalyptic number.

21121002144103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121002144103 is an equidigital number, since it uses as much as digits as its factorization.

21121002144103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 21121002144103 its reverse (30144120012112), we get a palindrome (51265122156215).

The spelling of 21121002144103 in words is "twenty-one trillion, one hundred twenty-one billion, two million, one hundred forty-four thousand, one hundred three".