102312020009 has 4 divisors (see below), whose sum is σ = 102354992580. Its totient is φ = 102269047440.

The previous prime is 102312020003. The next prime is 102312020011. The reversal of 102312020009 is 900020213201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900020213201 = 71 ⋅12676341031.

It can be written as a sum of positive squares in 2 ways, for example, as 37606905625 + 64705114384 = 193925^2 + 254372^2 .

It is a cyclic number.

It is not a de Polignac number, because 102312020009 - 2⁴ = 102312019993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102312020003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21482714 + ... + 21487475.

It is an arithmetic number, because the mean of its divisors is an integer number (25588748145).

Almost surely, 2^102312020009 is an apocalyptic number.

It is an amenable number.

102312020009 is a deficient number, since it is larger than the sum of its proper divisors (42972571).

102312020009 is an equidigital number, since it uses as much as digits as its factorization.

102312020009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42972570.

The product of its (nonzero) digits is 216, while the sum is 20.

The spelling of 102312020009 in words is "one hundred two billion, three hundred twelve million, twenty thousand, nine".