21121002144133 has 16 divisors (see below), whose sum is σ = 21430840596480. Its totient is φ = 20812527984816.

The previous prime is 21121002144113. The next prime is 21121002144139. The reversal of 21121002144133 is 33144120012112.

It is a cyclic number.

It is not a de Polignac number, because 21121002144133 - 2⁴¹ = 18921978888581 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21121002144098 and 21121002144107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121002144139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75812016 + ... + 76090102.

It is an arithmetic number, because the mean of its divisors is an integer number (1339427537280).

Almost surely, 2^{21121002144133} is an apocalyptic number.

It is an amenable number.

21121002144133 is a deficient number, since it is larger than the sum of its proper divisors (309838452347).

21121002144133 is a wasteful number, since it uses less digits than its factorization.

21121002144133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280536.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 21121002144133 its reverse (33144120012112), we get a palindrome (54265122156245).

The spelling of 21121002144133 in words is "twenty-one trillion, one hundred twenty-one billion, two million, one hundred forty-four thousand, one hundred thirty-three".