9121081972707 has 36 divisors (see below), whose sum is σ = 13558833568840. Its totient is φ = 6060037984632.

The previous prime is 9121081972699. The next prime is 9121081972711. The reversal of 9121081972707 is 7072791801219.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 9121081972707 - 2³ = 9121081972699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9121081972757) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5633774344 + ... + 5633775962.

Almost surely, 2^{9121081972707} is an apocalyptic number.

9121081972707 is a deficient number, since it is larger than the sum of its proper divisors (4437751596133).

9121081972707 is an frugal number, since it uses more digits than its factorization.

9121081972707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3965 (or 1981 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 54.

The spelling of 9121081972707 in words is "nine trillion, one hundred twenty-one billion, eighty-one million, nine hundred seventy-two thousand, seven hundred seven".