1105121331 has 24 divisors (see below), whose sum is σ = 1612656864. Its totient is φ = 729231360.

The previous prime is 1105121327. The next prime is 1105121333. The reversal of 1105121331 is 1331215011.

1105121331 is a `hidden beast` number, since 110 + 512 + 13 + 31 = 666.

It is not a de Polignac number, because 1105121331 - 2² = 1105121327 is a prime.

It is a super-2 number, since 2×1105121331² = 2442586312462423122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1105121333) 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, 384841 + ... + 387701.

It is an arithmetic number, because the mean of its divisors is an integer number (67194036).

Almost surely, 2^1105121331 is an apocalyptic number.

1105121331 is a deficient number, since it is larger than the sum of its proper divisors (507535533).

1105121331 is a wasteful number, since it uses less digits than its factorization.

1105121331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3291 (or 3288 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 1105121331 is about 33243.3652177393. The cubic root of 1105121331 is about 1033.8796502638.

Adding to 1105121331 its reverse (1331215011), we get a palindrome (2436336342).

The spelling of 1105121331 in words is "one billion, one hundred five million, one hundred twenty-one thousand, three hundred thirty-one".