1200521551512 has 16 divisors (see below), whose sum is σ = 3001303878840. Its totient is φ = 400173850496.

The previous prime is 1200521551499. The next prime is 1200521551613. The reversal of 1200521551512 is 2151551250021.

It is a super-2 number, since 2×1200521551512² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1200521551512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25010865633 + ... + 25010865680.

Almost surely, 2^{1200521551512} is an apocalyptic number.

1200521551512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1200521551512 is an abundant number, since it is smaller than the sum of its proper divisors (1800782327328).

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

1200521551512 is a wasteful number, since it uses less digits than its factorization.

1200521551512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50021731322 (or 50021731318 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 30.

The spelling of 1200521551512 in words is "one trillion, two hundred billion, five hundred twenty-one million, five hundred fifty-one thousand, five hundred twelve".