1126721320868 has 96 divisors (see below), whose sum is σ = 2439371531520. Its totient is φ = 448046691840.

The previous prime is 1126721320861. The next prime is 1126721320883. The reversal of 1126721320868 is 8680231276211.

It is a super-2 number, since 2×1126721320868² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1126721320861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1041146 + ... + 1826862.

It is an arithmetic number, because the mean of its divisors is an integer number (25410120120).

Almost surely, 2^{1126721320868} is an apocalyptic number.

It is an amenable number.

1126721320868 is an abundant number, since it is smaller than the sum of its proper divisors (1312650210652).

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

1126721320868 is a wasteful number, since it uses less digits than its factorization.

1126721320868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785877 (or 785875 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 1126721320868 in words is "one trillion, one hundred twenty-six billion, seven hundred twenty-one million, three hundred twenty thousand, eight hundred sixty-eight".