12201111101001 has 4 divisors (see below), whose sum is σ = 16268148134672. Its totient is φ = 8134074067332.

The previous prime is 12201111100943. The next prime is 12201111101017. The reversal of 12201111101001 is 10010111110221.

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 not a de Polignac number, because 12201111101001 - 2¹⁰ = 12201111099977 is a prime.

It is a super-2 number, since 2×12201111101001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12201111102001) 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, 2033518516831 + ... + 2033518516836.

It is an arithmetic number, because the mean of its divisors is an integer number (4067037033668).

Almost surely, 2^{12201111101001} is an apocalyptic number.

It is an amenable number.

12201111101001 is a deficient number, since it is larger than the sum of its proper divisors (4067037033671).

12201111101001 is an equidigital number, since it uses as much as digits as its factorization.

12201111101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4067037033670.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 12201111101001 its reverse (10010111110221), we get a palindrome (22211222211222).

The spelling of 12201111101001 in words is "twelve trillion, two hundred one billion, one hundred eleven million, one hundred one thousand, one".