1021112311 has 4 divisors (see below), whose sum is σ = 1021424392. Its totient is φ = 1020800232.

The previous prime is 1021112303. The next prime is 1021112321. The reversal of 1021112311 is 1132111201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1021112311 - 2³ = 1021112303 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021112291 and 1021112300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021112321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151080 + ... + 157693.

It is an arithmetic number, because the mean of its divisors is an integer number (255356098).

Almost surely, 2^1021112311 is an apocalyptic number.

1021112311 is a deficient number, since it is larger than the sum of its proper divisors (312081).

1021112311 is an equidigital number, since it uses as much as digits as its factorization.

1021112311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312080.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1021112311 is about 31954.8480046456. The cubic root of 1021112311 is about 1006.9884843170.

Adding to 1021112311 its reverse (1132111201), we get a palindrome (2153223512).

It can be divided in two parts, 10211 and 12311, that added together give a palindrome (22522).

The spelling of 1021112311 in words is "one billion, twenty-one million, one hundred twelve thousand, three hundred eleven".