211233042309 has 12 divisors (see below), whose sum is σ = 299185901984. Its totient is φ = 132538378944.

The previous prime is 211233042259. The next prime is 211233042311. The reversal of 211233042309 is 903240332112.

It is not a de Polignac number, because 211233042309 - 2²⁷ = 211098824581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211233042359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121817497 + ... + 121819230.

Almost surely, 2^211233042309 is an apocalyptic number.

It is an amenable number.

211233042309 is a deficient number, since it is larger than the sum of its proper divisors (87952859675).

211233042309 is a wasteful number, since it uses less digits than its factorization.

211233042309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243636764 (or 243636747 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The spelling of 211233042309 in words is "two hundred eleven billion, two hundred thirty-three million, forty-two thousand, three hundred nine".