1001111312 has 10 divisors (see below), whose sum is σ = 1939653198. Its totient is φ = 500555648.

The previous prime is 1001111299. The next prime is 1001111323. The reversal of 1001111312 is 2131111001.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 921972496 + 79138816 = 30364^2 + 8896^2 .

It is a super-2 number, since 2×1001111312² = 2004447718028722688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1001111293 and 1001111302.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31284713 + ... + 31284744.

Almost surely, 2^1001111312 is an apocalyptic number.

It is an amenable number.

1001111312 is a deficient number, since it is larger than the sum of its proper divisors (938541886).

1001111312 is an equidigital number, since it uses as much as digits as its factorization.

1001111312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62569465 (or 62569459 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1001111312 is about 31640.3431081270. The cubic root of 1001111312 is about 1000.3703001942.

Adding to 1001111312 its reverse (2131111001), we get a palindrome (3132222313).

The spelling of 1001111312 in words is "one billion, one million, one hundred eleven thousand, three hundred twelve".