2113540451521 has 16 divisors (see below), whose sum is σ = 2241960868224. Its totient is φ = 1985576696064.

The previous prime is 2113540451509. The next prime is 2113540451549. The reversal of 2113540451521 is 1251540453112.

It is a cyclic number.

It is not a de Polignac number, because 2113540451521 - 2²⁹ = 2113003580609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2113540451591) 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, 43076415 + ... + 43125451.

It is an arithmetic number, because the mean of its divisors is an integer number (140122554264).

Almost surely, 2^{2113540451521} is an apocalyptic number.

It is an amenable number.

2113540451521 is a deficient number, since it is larger than the sum of its proper divisors (128420416703).

2113540451521 is a wasteful number, since it uses less digits than its factorization.

2113540451521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53640.

The product of its (nonzero) digits is 24000, while the sum is 34.

The spelling of 2113540451521 in words is "two trillion, one hundred thirteen billion, five hundred forty million, four hundred fifty-one thousand, five hundred twenty-one".