2102212091 has 16 divisors (see below), whose sum is σ = 2502236160. Its totient is φ = 1728488160.

The previous prime is 2102212043. The next prime is 2102212109. The reversal of 2102212091 is 1902122012.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2102212091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2102212391) 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, 38771 + ... + 75548.

It is an arithmetic number, because the mean of its divisors is an integer number (156389760).

Almost surely, 2^2102212091 is an apocalyptic number.

2102212091 is a deficient number, since it is larger than the sum of its proper divisors (400024069).

2102212091 is a wasteful number, since it uses less digits than its factorization.

2102212091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114434.

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

The square root of 2102212091 is about 45849.8864884091. The cubic root of 2102212091 is about 1281.0286512690.

The spelling of 2102212091 in words is "two billion, one hundred two million, two hundred twelve thousand, ninety-one".