1521130540412 has 24 divisors (see below), whose sum is σ = 3051288580704. Its totient is φ = 649978624512.

The previous prime is 1521130540403. The next prime is 1521130540417. The reversal of 1521130540412 is 2140450311251.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521130540417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80593073 + ... + 80611944.

It is an arithmetic number, because the mean of its divisors is an integer number (127137024196).

Almost surely, 2^{1521130540412} is an apocalyptic number.

It is an amenable number.

1521130540412 is an abundant number, since it is smaller than the sum of its proper divisors (1530158040292).

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

1521130540412 is a wasteful number, since it uses less digits than its factorization.

1521130540412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161205365 (or 161205363 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

Adding to 1521130540412 its reverse (2140450311251), we get a palindrome (3661580851663).

The spelling of 1521130540412 in words is "one trillion, five hundred twenty-one billion, one hundred thirty million, five hundred forty thousand, four hundred twelve".