1311032211111 has 24 divisors (see below), whose sum is σ = 2222736725664. Its totient is φ = 728913660480.

The previous prime is 1311032211043. The next prime is 1311032211157. The reversal of 1311032211111 is 1111122301131.

1311032211111 is a `hidden beast` number, since 1 + 311 + 0 + 32 + 211 + 111 = 666.

It is not a de Polignac number, because 1311032211111 - 2¹³ = 1311032202919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311032211211) 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, 281214360 + ... + 281219021.

It is an arithmetic number, because the mean of its divisors is an integer number (92614030236).

Almost surely, 2^{1311032211111} is an apocalyptic number.

1311032211111 is a deficient number, since it is larger than the sum of its proper divisors (911704514553).

1311032211111 is a wasteful number, since it uses less digits than its factorization.

1311032211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562433431 (or 562433428 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

Adding to 1311032211111 its reverse (1111122301131), we get a palindrome (2422154512242).

The spelling of 1311032211111 in words is "one trillion, three hundred eleven billion, thirty-two million, two hundred eleven thousand, one hundred eleven".