211401112209 has 16 divisors (see below), whose sum is σ = 322414453632. Its totient is φ = 120695851008.

The previous prime is 211401112193. The next prime is 211401112267. The reversal of 211401112209 is 902211104112.

It is not a de Polignac number, because 211401112209 - 2⁴ = 211401112193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211401112409) 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, 4341234 + ... + 4389659.

It is an arithmetic number, because the mean of its divisors is an integer number (20150903352).

Almost surely, 2^211401112209 is an apocalyptic number.

It is an amenable number.

211401112209 is a deficient number, since it is larger than the sum of its proper divisors (111013341423).

211401112209 is a wasteful number, since it uses less digits than its factorization.

211401112209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8732056.

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

It can be divided in two parts, 211401 and 112209, that added together give a triangular number (323610 = T₈₀₄).

The spelling of 211401112209 in words is "two hundred eleven billion, four hundred one million, one hundred twelve thousand, two hundred nine".