2012120611521 has 8 divisors (see below), whose sum is σ = 2687175665184. Its totient is φ = 1339239649440.

The previous prime is 2012120611511. The next prime is 2012120611537. The reversal of 2012120611521 is 1251160212102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2012120611521 - 2⁹ = 2012120611009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2012120611491 and 2012120611500.

It is not an unprimeable number, because it can be changed into a prime (2012120611511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 543520735 + ... + 543524436.

It is an arithmetic number, because the mean of its divisors is an integer number (335896958148).

Almost surely, 2^{2012120611521} is an apocalyptic number.

It is an amenable number.

2012120611521 is a deficient number, since it is larger than the sum of its proper divisors (675055053663).

2012120611521 is a wasteful number, since it uses less digits than its factorization.

2012120611521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087045791.

The product of its (nonzero) digits is 480, while the sum is 24.

Adding to 2012120611521 its reverse (1251160212102), we get a palindrome (3263280823623).

The spelling of 2012120611521 in words is "two trillion, twelve billion, one hundred twenty million, six hundred eleven thousand, five hundred twenty-one".