9912320001 has 10 divisors (see below), whose sum is σ = 14807292962. Its totient is φ = 6608213280.

The previous prime is 9912319997. The next prime is 9912320009. The reversal of 9912320001 is 1000232199.

It can be written as a sum of positive squares in only one way, i.e., 6237050625 + 3675269376 = 78975^2 + 60624^2 .

It is not a de Polignac number, because 9912320001 - 2² = 9912319997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9912320009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 61187080 + ... + 61187241.

It is a Proth number, since it is equal to 75625 ⋅ 2¹⁷ + 1 and 75625 < 2¹⁷.

Almost surely, 2^9912320001 is an apocalyptic number.

It is an amenable number.

9912320001 is a deficient number, since it is larger than the sum of its proper divisors (4894972961).

9912320001 is a wasteful number, since it uses less digits than its factorization.

9912320001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122374333 (or 122374324 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 9912320001 is about 99560.6347960880. The cubic root of 9912320001 is about 2148.1195023399.

It can be divided in two parts, 99 and 12320001, that added together give a square (12320100 = 3510²).

The spelling of 9912320001 in words is "nine billion, nine hundred twelve million, three hundred twenty thousand, one".