1111211212211 has 8 divisors (see below), whose sum is σ = 1132216511760. Its totient is φ = 1090207359072.

The previous prime is 1111211212183. The next prime is 1111211212229. The reversal of 1111211212211 is 1122121121111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1111211212211 - 2³⁸ = 836333305267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1111211212211.

It is not an unprimeable number, because it can be changed into a prime (1111211217211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1257281 + ... + 1950173.

It is an arithmetic number, because the mean of its divisors is an integer number (141527063970).

Almost surely, 2^{1111211212211} is an apocalyptic number.

1111211212211 is a deficient number, since it is larger than the sum of its proper divisors (21005299549).

1111211212211 is an equidigital number, since it uses as much as digits as its factorization.

1111211212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723205.

The product of its digits is 16, while the sum is 17.

Adding to 1111211212211 its reverse (1122121121111), we get a palindrome (2233332333322).

The spelling of 1111211212211 in words is "one trillion, one hundred eleven billion, two hundred eleven million, two hundred twelve thousand, two hundred eleven".