1111001312331 has 8 divisors (see below), whose sum is σ = 1645927870160. Its totient is φ = 740667541536.

The previous prime is 1111001312243. The next prime is 1111001312359. The reversal of 1111001312331 is 1332131001111.

1111001312331 is a `hidden beast` number, since 1 + 11 + 10 + 0 + 1 + 312 + 331 = 666.

It is not a de Polignac number, because 1111001312331 - 2¹¹ = 1111001310283 is a prime.

It is a super-2 number, since 2×1111001312331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111001312431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20574098350 + ... + 20574098403.

It is an arithmetic number, because the mean of its divisors is an integer number (205740983770).

Almost surely, 2^{1111001312331} is an apocalyptic number.

1111001312331 is a deficient number, since it is larger than the sum of its proper divisors (534926557829).

1111001312331 is an equidigital number, since it uses as much as digits as its factorization.

1111001312331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41148196762 (or 41148196756 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

Adding to 1111001312331 its reverse (1332131001111), we get a palindrome (2443132313442).

The spelling of 1111001312331 in words is "one trillion, one hundred eleven billion, one million, three hundred twelve thousand, three hundred thirty-one".