1020135512 has 48 divisors (see below), whose sum is σ = 2111938920. Its totient is φ = 461605760.

The previous prime is 1020135509. The next prime is 1020135521. The reversal of 1020135512 is 2155310201.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 223283 + ... + 227805.

Almost surely, 2^1020135512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020135512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1055969460).

1020135512 is an abundant number, since it is smaller than the sum of its proper divisors (1091803408).

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

1020135512 is a wasteful number, since it uses less digits than its factorization.

1020135512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4784 (or 4769 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1020135512 is about 31939.5602975370. The cubic root of 1020135512 is about 1006.6672858399.

Adding to 1020135512 its reverse (2155310201), we get a palindrome (3175445713).

The spelling of 1020135512 in words is "one billion, twenty million, one hundred thirty-five thousand, five hundred twelve".