11312111221211 has 16 divisors (see below), whose sum is σ = 11392479796320. Its totient is φ = 11232099191040.

The previous prime is 11312111221207. The next prime is 11312111221223. The reversal of 11312111221211 is 11212211121311.

It is a cyclic number.

It is not a de Polignac number, because 11312111221211 - 2² = 11312111221207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11312111221291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91966031 + ... + 92088951.

It is an arithmetic number, because the mean of its divisors is an integer number (712029987270).

Almost surely, 2^{11312111221211} is an apocalyptic number.

11312111221211 is a deficient number, since it is larger than the sum of its proper divisors (80368575109).

11312111221211 is a wasteful number, since it uses less digits than its factorization.

11312111221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124366.

The product of its digits is 48, while the sum is 20.

Adding to 11312111221211 its reverse (11212211121311), we get a palindrome (22524322342522).

The spelling of 11312111221211 in words is "eleven trillion, three hundred twelve billion, one hundred eleven million, two hundred twenty-one thousand, two hundred eleven".