1212011112 has 128 divisors (see below), whose sum is σ = 3328617600. Its totient is φ = 365534208.

The previous prime is 1212011111. The next prime is 1212011117. The reversal of 1212011112 is 2111102121.

It is a super-2 number, since 2×1212011112² = 2937941871222953088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (1212011111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5339143 + ... + 5339369.

It is an arithmetic number, because the mean of its divisors is an integer number (26004825).

Almost surely, 2^1212011112 is an apocalyptic number.

1212011112 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 1212011112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1664308800).

1212011112 is an abundant number, since it is smaller than the sum of its proper divisors (2116606488).

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

1212011112 is a wasteful number, since it uses less digits than its factorization.

1212011112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1212011112 is about 34813.9499626227. The cubic root of 1212011112 is about 1066.1922806342.

Adding to 1212011112 its reverse (2111102121), we get a palindrome (3323113233).

It can be divided in two parts, 12120 and 11112, that added together give a palindrome (23232).

The spelling of 1212011112 in words is "one billion, two hundred twelve million, eleven thousand, one hundred twelve".