1113121212 has 48 divisors (see below), whose sum is σ = 2971433472. Its totient is φ = 317701440.

The previous prime is 1113121201. The next prime is 1113121231. The reversal of 1113121212 is 2121213111.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1113121191 and 1113121200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80178 + ... + 93030.

It is an arithmetic number, because the mean of its divisors is an integer number (61904864).

Almost surely, 2^1113121212 is an apocalyptic number.

1113121212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1113121212 is an abundant number, since it is smaller than the sum of its proper divisors (1858312260).

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

1113121212 is a wasteful number, since it uses less digits than its factorization.

1113121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13898 (or 13896 counting only the distinct ones).

The product of its digits is 24, while the sum is 15.

The square root of 1113121212 is about 33363.4712222814. The cubic root of 1113121212 is about 1036.3683774679.

Adding to 1113121212 its reverse (2121213111), we get a palindrome (3234334323).

The spelling of 1113121212 in words is "one billion, one hundred thirteen million, one hundred twenty-one thousand, two hundred twelve".