1011312220209 has 4 divisors (see below), whose sum is σ = 1348416293616. Its totient is φ = 674208146804.

The previous prime is 1011312220201. The next prime is 1011312220229. The reversal of 1011312220209 is 9020222131101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1011312220209 - 2³ = 1011312220201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1011312220201) 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, 168552036699 + ... + 168552036704.

It is an arithmetic number, because the mean of its divisors is an integer number (337104073404).

Almost surely, 2^{1011312220209} is an apocalyptic number.

It is an amenable number.

1011312220209 is a deficient number, since it is larger than the sum of its proper divisors (337104073407).

1011312220209 is an equidigital number, since it uses as much as digits as its factorization.

1011312220209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337104073406.

The product of its (nonzero) digits is 432, while the sum is 24.

The spelling of 1011312220209 in words is "one trillion, eleven billion, three hundred twelve million, two hundred twenty thousand, two hundred nine".