211011222009 has 16 divisors (see below), whose sum is σ = 322512343040. Its totient is φ = 120213553680.

The previous prime is 211011221989. The next prime is 211011222017. The reversal of 211011222009 is 900222110112.

It is not a de Polignac number, because 211011222009 - 2⁵ = 211011221977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211011224009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15171529 + ... + 15185430.

It is an arithmetic number, because the mean of its divisors is an integer number (20157021440).

Almost surely, 2^211011222009 is an apocalyptic number.

It is an amenable number.

211011222009 is a deficient number, since it is larger than the sum of its proper divisors (111501121031).

211011222009 is a wasteful number, since it uses less digits than its factorization.

211011222009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30357300.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 211011222009 in words is "two hundred eleven billion, eleven million, two hundred twenty-two thousand, nine".