2125140152521 has 4 divisors (see below), whose sum is σ = 2161159477200. Its totient is φ = 2089120827844.

The previous prime is 2125140152497. The next prime is 2125140152579. The reversal of 2125140152521 is 1252510415212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2125140152521 - 2²⁹ = 2124603281609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2125140152021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18009662251 + ... + 18009662368.

It is an arithmetic number, because the mean of its divisors is an integer number (540289869300).

Almost surely, 2^{2125140152521} is an apocalyptic number.

It is an amenable number.

2125140152521 is a deficient number, since it is larger than the sum of its proper divisors (36019324679).

2125140152521 is an equidigital number, since it uses as much as digits as its factorization.

2125140152521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36019324678.

The product of its (nonzero) digits is 8000, while the sum is 31.

Adding to 2125140152521 its reverse (1252510415212), we get a palindrome (3377650567733).

The spelling of 2125140152521 in words is "two trillion, one hundred twenty-five billion, one hundred forty million, one hundred fifty-two thousand, five hundred twenty-one".