12211201091 has 4 divisors (see below), whose sum is σ = 12211459392. Its totient is φ = 12210942792.

The previous prime is 12211201069. The next prime is 12211201097. The reversal of 12211201091 is 19010211221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19010211221 = 20959 ⋅907019.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12211201091 is a prime.

It is a super-2 number, since 2×12211201091² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211201097) 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, 35696 + ... + 160301.

It is an arithmetic number, because the mean of its divisors is an integer number (3052864848).

Almost surely, 2^12211201091 is an apocalyptic number.

12211201091 is a deficient number, since it is larger than the sum of its proper divisors (258301).

12211201091 is an equidigital number, since it uses as much as digits as its factorization.

12211201091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258300.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 12211201091 in words is "twelve billion, two hundred eleven million, two hundred one thousand, ninety-one".