11111211201 has 4 divisors (see below), whose sum is σ = 14814948272. Its totient is φ = 7407474132.

The previous prime is 11111211179. The next prime is 11111211247. The reversal of 11111211201 is 10211211111.

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 11111211201 - 2⁷ = 11111211073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111211401) 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, 1851868531 + ... + 1851868536.

It is an arithmetic number, because the mean of its divisors is an integer number (3703737068).

Almost surely, 2^11111211201 is an apocalyptic number.

It is an amenable number.

11111211201 is a deficient number, since it is larger than the sum of its proper divisors (3703737071).

11111211201 is an equidigital number, since it uses as much as digits as its factorization.

11111211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3703737070.

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

Adding to 11111211201 its reverse (10211211111), we get a palindrome (21322422312).

The spelling of 11111211201 in words is "eleven billion, one hundred eleven million, two hundred eleven thousand, two hundred one".