2021511522512 has 20 divisors (see below), whose sum is σ = 3917552777316. Its totient is φ = 1010530160640.

The previous prime is 2021511522493. The next prime is 2021511522553. The reversal of 2021511522512 is 2152251151202.

It can be written as a sum of positive squares in 2 ways, for example, as 844494833296 + 1177016689216 = 918964^2 + 1084904^2 .

It is a super-3 number, since 3×2021511522512³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14026103 + ... + 14169494.

Almost surely, 2^{2021511522512} is an apocalyptic number.

It is an amenable number.

2021511522512 is a deficient number, since it is larger than the sum of its proper divisors (1896041254804).

2021511522512 is a wasteful number, since it uses less digits than its factorization.

2021511522512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28200086 (or 28200080 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 2021511522512 its reverse (2152251151202), we get a palindrome (4173762673714).

The spelling of 2021511522512 in words is "two trillion, twenty-one billion, five hundred eleven million, five hundred twenty-two thousand, five hundred twelve".