211010190909 has 16 divisors (see below), whose sum is σ = 321548388480. Its totient is φ = 120573858240.

The previous prime is 211010190893. The next prime is 211010190917. The reversal of 211010190909 is 909091010112.

It is not a de Polignac number, because 211010190909 - 2⁴ = 211010190893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211010190909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211010190929) 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, 754479 + ... + 995619.

It is an arithmetic number, because the mean of its divisors is an integer number (20096774280).

Almost surely, 2^211010190909 is an apocalyptic number.

It is an amenable number.

211010190909 is a deficient number, since it is larger than the sum of its proper divisors (110538197571).

211010190909 is a wasteful number, since it uses less digits than its factorization.

211010190909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282820.

The product of its (nonzero) digits is 1458, while the sum is 33.

The spelling of 211010190909 in words is "two hundred eleven billion, ten million, one hundred ninety thousand, nine hundred nine".