1111131212211 has 24 divisors (see below), whose sum is σ = 1650352935504. Its totient is φ = 719855709120.

The previous prime is 1111131212203. The next prime is 1111131212287. The reversal of 1111131212211 is 1122121311111.

1111131212211 is a `hidden beast` number, since 1 + 111 + 131 + 212 + 211 = 666.

It is not a de Polignac number, because 1111131212211 - 2³ = 1111131212203 is a prime.

It is a super-2 number, since 2×1111131212211² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1111131212311) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1758721 + ... + 2305506.

It is an arithmetic number, because the mean of its divisors is an integer number (68764705646).

Almost surely, 2^{1111131212211} is an apocalyptic number.

1111131212211 is a deficient number, since it is larger than the sum of its proper divisors (539221723293).

1111131212211 is a wasteful number, since it uses less digits than its factorization.

1111131212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4065091 (or 4065088 counting only the distinct ones).

The product of its digits is 24, while the sum is 18.

Adding to 1111131212211 its reverse (1122121311111), we get a palindrome (2233252523322).

The spelling of 1111131212211 in words is "one trillion, one hundred eleven billion, one hundred thirty-one million, two hundred twelve thousand, two hundred eleven".