1821752511121 has 16 divisors (see below), whose sum is σ = 1845152654400. Its totient is φ = 1798481356288.

The previous prime is 1821752511119. The next prime is 1821752511133. The reversal of 1821752511121 is 1211152571281.

It is a cyclic number.

It is not a de Polignac number, because 1821752511121 - 2¹ = 1821752511119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1821752511721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36078390 + ... + 36128848.

It is an arithmetic number, because the mean of its divisors is an integer number (115322040900).

Almost surely, 2^{1821752511121} is an apocalyptic number.

It is an amenable number.

1821752511121 is a deficient number, since it is larger than the sum of its proper divisors (23400143279).

1821752511121 is a wasteful number, since it uses less digits than its factorization.

1821752511121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51728.

The product of its digits is 11200, while the sum is 37.

The spelling of 1821752511121 in words is "one trillion, eight hundred twenty-one billion, seven hundred fifty-two million, five hundred eleven thousand, one hundred twenty-one".