9720354771122 has 18 divisors (see below), whose sum is σ = 14601123309303. Its totient is φ = 4853323343232.

The previous prime is 9720354771121. The next prime is 9720354771131. The reversal of 9720354771122 is 2211774530279.

It can be written as a sum of positive squares in 5 ways, for example, as 9074017560721 + 646337210401 = 3012311^2 + 803951^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2204581.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9720354771121) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 4819213058 + ... + 4819215074.

Almost surely, 2^{9720354771122} is an apocalyptic number.

9720354771122 is a deficient number, since it is larger than the sum of its proper divisors (4880768538181).

9720354771122 is an frugal number, since it uses more digits than its factorization.

9720354771122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6222 (or 3112 counting only the distinct ones).

The product of its (nonzero) digits is 1481760, while the sum is 50.

Multiplying 9720354771122 by its sum of digits (50), we get a square (486017738556100 = 22045810²).

The spelling of 9720354771122 in words is "nine trillion, seven hundred twenty billion, three hundred fifty-four million, seven hundred seventy-one thousand, one hundred twenty-two".