2121053543541 has 24 divisors (see below), whose sum is σ = 3119895118080. Its totient is φ = 1388286463200.

The previous prime is 2121053543507. The next prime is 2121053543549. The reversal of 2121053543541 is 1453453501212.

2121053543541 is a `hidden beast` number, since 2 + 1 + 2 + 10 + 53 + 54 + 3 + 541 = 666.

It is not a de Polignac number, because 2121053543541 - 2¹¹ = 2121053541493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121053543496 and 2121053543505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121053543549) 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 in 23 ways as a sum of consecutive naturals, for example, 6791490 + ... + 7096931.

It is an arithmetic number, because the mean of its divisors is an integer number (129995629920).

Almost surely, 2^{2121053543541} is an apocalyptic number.

It is an amenable number.

2121053543541 is a deficient number, since it is larger than the sum of its proper divisors (998841574539).

2121053543541 is a wasteful number, since it uses less digits than its factorization.

2121053543541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13888737 (or 13888734 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 2121053543541 in words is "two trillion, one hundred twenty-one billion, fifty-three million, five hundred forty-three thousand, five hundred forty-one".