211102202009 has 4 divisors (see below), whose sum is σ = 222212844240. Its totient is φ = 199991559780.

The previous prime is 211102201991. The next prime is 211102202063. The reversal of 211102202009 is 900202201112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211102202009 - 2²⁸ = 210833766553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211102262009) 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, 5555321087 + ... + 5555321124.

It is an arithmetic number, because the mean of its divisors is an integer number (55553211060).

Almost surely, 2^211102202009 is an apocalyptic number.

It is an amenable number.

211102202009 is a deficient number, since it is larger than the sum of its proper divisors (11110642231).

211102202009 is a wasteful number, since it uses less digits than its factorization.

211102202009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11110642230.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 211102202009 in words is "two hundred eleven billion, one hundred two million, two hundred two thousand, nine".