1011111012 has 30 divisors (see below), whose sum is σ = 2643244758. Its totient is φ = 337036896.

The previous prime is 1011110999. The next prime is 1011111053. The reversal of 1011111012 is 2101111101.

It can be written as a sum of positive squares in only one way, i.e., 1007046756 + 4064256 = 31734^2 + 2016^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1011110985 and 1011111003.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1560033 + ... + 1560680.

Almost surely, 2^1011111012 is an apocalyptic number.

1011111012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1011111012 is an abundant number, since it is smaller than the sum of its proper divisors (1632133746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1011111012 is a wasteful number, since it uses less digits than its factorization.

1011111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120729 (or 3120718 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

The square root of 1011111012 is about 31797.9718221147. The cubic root of 1011111012 is about 1003.6900375413.

Adding to 1011111012 its reverse (2101111101), we get a palindrome (3112222113).

It can be divided in two parts, 101111101 and 2, that multiplied together give a palindrome (202222202).

The spelling of 1011111012 in words is "one billion, eleven million, one hundred eleven thousand, twelve".