1000111212 has 72 divisors (see below), whose sum is σ = 2706342912. Its totient is φ = 322606800.

The previous prime is 1000111201. The next prime is 1000111213. The reversal of 1000111212 is 2121110001.

It is a happy number.

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 = 1000111194 and 1000111203.

It is not an unprimeable number, because it can be changed into a prime (1000111213) 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, 13537 + ... + 46727.

It is an arithmetic number, because the mean of its divisors is an integer number (37588096).

Almost surely, 2^1000111212 is an apocalyptic number.

1000111212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1000111212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1353171456).

1000111212 is an abundant number, since it is smaller than the sum of its proper divisors (1706231700).

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

1000111212 is a wasteful number, since it uses less digits than its factorization.

1000111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33241 (or 33227 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1000111212 is about 31624.5349689130. The cubic root of 1000111212 is about 1000.0370692925.

Adding to 1000111212 its reverse (2121110001), we get a palindrome (3121221213).

The spelling of 1000111212 in words is "one billion, one hundred eleven thousand, two hundred twelve".