1213128371276 has 24 divisors (see below), whose sum is σ = 2253071007936. Its totient is φ = 569559368960.

The previous prime is 1213128371263. The next prime is 1213128371297. The reversal of 1213128371276 is 6721738213121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20666891 + ... + 20725506.

It is an arithmetic number, because the mean of its divisors is an integer number (93877958664).

Almost surely, 2^{1213128371276} is an apocalyptic number.

It is an amenable number.

1213128371276 is a deficient number, since it is larger than the sum of its proper divisors (1039942636660).

1213128371276 is a wasteful number, since it uses less digits than its factorization.

1213128371276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41392849 (or 41392847 counting only the distinct ones).

The product of its digits is 169344, while the sum is 44.

The spelling of 1213128371276 in words is "one trillion, two hundred thirteen billion, one hundred twenty-eight million, three hundred seventy-one thousand, two hundred seventy-six".