1112021221212 has 60 divisors (see below), whose sum is σ = 3171319789176. Its totient is φ = 336976126560.

The previous prime is 1112021221189. The next prime is 1112021221217. The reversal of 1112021221212 is 2121221202111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112021221217) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 156003903 + ... + 156011030.

Almost surely, 2^{1112021221212} is an apocalyptic number.

1112021221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1112021221212 is an abundant number, since it is smaller than the sum of its proper divisors (2059298567964).

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

1112021221212 is a wasteful number, since it uses less digits than its factorization.

1112021221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312014960 (or 312014949 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1112021221212 its reverse (2121221202111), we get a palindrome (3233242423323).

The spelling of 1112021221212 in words is "one trillion, one hundred twelve billion, twenty-one million, two hundred twenty-one thousand, two hundred twelve".