1015121320552 has 32 divisors (see below), whose sum is σ = 2028660880320. Its totient is φ = 474540537600.

The previous prime is 1015121320513. The next prime is 1015121320561. The reversal of 1015121320552 is 2550231215101.

It is a happy number.

1015121320552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1015121320552.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24695118 + ... + 24736189.

It is an arithmetic number, because the mean of its divisors is an integer number (63395652510).

Almost surely, 2^{1015121320552} is an apocalyptic number.

It is an amenable number.

1015121320552 is a deficient number, since it is larger than the sum of its proper divisors (1013539559768).

1015121320552 is a wasteful number, since it uses less digits than its factorization.

1015121320552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49431481 (or 49431477 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 1015121320552 its reverse (2550231215101), we get a palindrome (3565352535653).

The spelling of 1015121320552 in words is "one trillion, fifteen billion, one hundred twenty-one million, three hundred twenty thousand, five hundred fifty-two".