1000020312209 has 6 divisors (see below), whose sum is σ = 1055423099970. Its totient is φ = 947387663856.

The previous prime is 1000020312191. The next prime is 1000020312293. The reversal of 1000020312209 is 9022130200001.

It can be written as a sum of positive squares in only one way, i.e., 866761000000 + 133259312209 = 931000^2 + 365047^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1000020312209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000020312509) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1385069324 + ... + 1385070045.

It is an arithmetic number, because the mean of its divisors is an integer number (175903849995).

Almost surely, 2^{1000020312209} is an apocalyptic number.

1000020312209 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1000020312209 is a deficient number, since it is larger than the sum of its proper divisors (55402787761).

1000020312209 is an equidigital number, since it uses as much as digits as its factorization.

1000020312209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770139407 (or 2770139388 counting only the distinct ones).

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

The spelling of 1000020312209 in words is "one trillion, twenty million, three hundred twelve thousand, two hundred nine".