1199857331128 has 8 divisors (see below), whose sum is σ = 2249732495880. Its totient is φ = 599928665560.

The previous prime is 1199857331111. The next prime is 1199857331171. The reversal of 1199857331128 is 8211337589911.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74991083188 + ... + 74991083203.

It is an arithmetic number, because the mean of its divisors is an integer number (281216561985).

Almost surely, 2^{1199857331128} is an apocalyptic number.

It is an amenable number.

1199857331128 is a deficient number, since it is larger than the sum of its proper divisors (1049875164752).

1199857331128 is a wasteful number, since it uses less digits than its factorization.

1199857331128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149982166397 (or 149982166393 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 58.

The spelling of 1199857331128 in words is "one trillion, one hundred ninety-nine billion, eight hundred fifty-seven million, three hundred thirty-one thousand, one hundred twenty-eight".