1011512512020 has 24 divisors (see below), whose sum is σ = 2832235033824. Its totient is φ = 269736669856.

The previous prime is 1011512512019. The next prime is 1011512512097. The reversal of 1011512512020 is 202152151101.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8429270874 + ... + 8429270993.

It is an arithmetic number, because the mean of its divisors is an integer number (118009793076).

Almost surely, 2^{1011512512020} is an apocalyptic number.

1011512512020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011512512020 is an abundant number, since it is smaller than the sum of its proper divisors (1820722521804).

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

1011512512020 is a wasteful number, since it uses less digits than its factorization.

1011512512020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16858541879 (or 16858541877 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 21.

Adding to 1011512512020 its reverse (202152151101), we get a palindrome (1213664663121).

The spelling of 1011512512020 in words is "one trillion, eleven billion, five hundred twelve million, five hundred twelve thousand, twenty".