1011220012009 has 4 divisors (see below), whose sum is σ = 1011289492804. Its totient is φ = 1011150531216.

The previous prime is 1011220011953. The next prime is 1011220012013. The reversal of 1011220012009 is 9002100221101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93618864784 + 917601147225 = 305972^2 + 957915^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011220012009 - 2⁷ = 1011220011881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011220012909) 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, 34718562 + ... + 34747675.

It is an arithmetic number, because the mean of its divisors is an integer number (252822373201).

Almost surely, 2^{1011220012009} is an apocalyptic number.

It is an amenable number.

1011220012009 is a deficient number, since it is larger than the sum of its proper divisors (69480795).

1011220012009 is an equidigital number, since it uses as much as digits as its factorization.

1011220012009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69480794.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 1011220012009 in words is "one trillion, eleven billion, two hundred twenty million, twelve thousand, nine".