2111020222009 has 4 divisors (see below), whose sum is σ = 2139938307316. Its totient is φ = 2082102136704.

The previous prime is 2111020222001. The next prime is 2111020222061. The reversal of 2111020222009 is 9002220201112.

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 1494053959225 + 616966262784 = 1222315^2 + 785472^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111020222009 - 2³ = 2111020222001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111020222001) 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, 14459042544 + ... + 14459042689.

It is an arithmetic number, because the mean of its divisors is an integer number (534984576829).

Almost surely, 2^{2111020222009} is an apocalyptic number.

It is an amenable number.

2111020222009 is a deficient number, since it is larger than the sum of its proper divisors (28918085307).

2111020222009 is an equidigital number, since it uses as much as digits as its factorization.

2111020222009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28918085306.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 2111020222009 in words is "two trillion, one hundred eleven billion, twenty million, two hundred twenty-two thousand, nine".