2121526171242 has 48 divisors (see below), whose sum is σ = 4709529796608. Its totient is φ = 689813424960.

The previous prime is 2121526171223. The next prime is 2121526171243. The reversal of 2121526171242 is 2421716251212.

2121526171242 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 526 + 1 + 7 + 124 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 2121526171197 and 2121526171206.

It is not an unprimeable number, because it can be changed into a prime (2121526171243) 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, 4299553 + ... + 4767515.

It is an arithmetic number, because the mean of its divisors is an integer number (98115204096).

Almost surely, 2^{2121526171242} is an apocalyptic number.

2121526171242 is an abundant number, since it is smaller than the sum of its proper divisors (2588003625366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121526171242 is a wasteful number, since it uses less digits than its factorization.

2121526171242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474155 (or 474152 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The spelling of 2121526171242 in words is "two trillion, one hundred twenty-one billion, five hundred twenty-six million, one hundred seventy-one thousand, two hundred forty-two".