211121222109 has 32 divisors (see below), whose sum is σ = 332386289664. Its totient is φ = 116691019200.

The previous prime is 211121222083. The next prime is 211121222131. The reversal of 211121222109 is 901222121112.

It is not a de Polignac number, because 211121222109 - 2⁷ = 211121221981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121222009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1041942 + ... + 1227959.

It is an arithmetic number, because the mean of its divisors is an integer number (10387071552).

Almost surely, 2^211121222109 is an apocalyptic number.

It is an amenable number.

211121222109 is a deficient number, since it is larger than the sum of its proper divisors (121265067555).

211121222109 is a wasteful number, since it uses less digits than its factorization.

211121222109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270057.

The product of its (nonzero) digits is 288, while the sum is 24.

The spelling of 211121222109 in words is "two hundred eleven billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred nine".