12122102091 has 32 divisors (see below), whose sum is σ = 18416885760. Its totient is φ = 7020384800.

The previous prime is 12122102077. The next prime is 12122102147. The reversal of 12122102091 is 19020122121.

It is a de Polignac number, because none of the positive numbers 2^k-12122102091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12122102791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 820750 + ... + 835388.

It is an arithmetic number, because the mean of its divisors is an integer number (575527680).

Almost surely, 2^12122102091 is an apocalyptic number.

12122102091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12122102091 is a deficient number, since it is larger than the sum of its proper divisors (6294783669).

12122102091 is a wasteful number, since it uses less digits than its factorization.

12122102091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15767.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 12122102091 in words is "twelve billion, one hundred twenty-two million, one hundred two thousand, ninety-one".