1200513338991 has 12 divisors (see below), whose sum is σ = 1738079620368. Its totient is φ = 798493857984.

The previous prime is 1200513338987. The next prime is 1200513339029. The reversal of 1200513338991 is 1998333150021.

1200513338991 is a `hidden beast` number, since 1 + 20 + 0 + 513 + 33 + 89 + 9 + 1 = 666.

It is not a de Polignac number, because 1200513338991 - 2² = 1200513338987 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200513378991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154026555 + ... + 154034348.

It is an arithmetic number, because the mean of its divisors is an integer number (144839968364).

Almost surely, 2^{1200513338991} is an apocalyptic number.

1200513338991 is a deficient number, since it is larger than the sum of its proper divisors (537566281377).

1200513338991 is a wasteful number, since it uses less digits than its factorization.

1200513338991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308061342 (or 308061339 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The spelling of 1200513338991 in words is "one trillion, two hundred billion, five hundred thirteen million, three hundred thirty-eight thousand, nine hundred ninety-one".