1112220121000 has 64 divisors (see below), whose sum is σ = 2755688953680. Its totient is φ = 418718156800.

The previous prime is 1112220120967. The next prime is 1112220121003. The reversal of 1112220121000 is 1210222111.

It can be written as a sum of positive squares in 8 ways, for example, as 207259846564 + 904960274436 = 455258^2 + 951294^2 .

It is not an unprimeable number, because it can be changed into a prime (1112220121003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32695357 + ... + 32729356.

Almost surely, 2^{1112220121000} is an apocalyptic number.

1112220121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1112220121000 is an abundant number, since it is smaller than the sum of its proper divisors (1643468832680).

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

1112220121000 is a wasteful number, since it uses less digits than its factorization.

1112220121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65424751 (or 65424737 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1112220121000 its reverse (1210222111), we get a palindrome (1113430343111).

The spelling of 1112220121000 in words is "one trillion, one hundred twelve billion, two hundred twenty million, one hundred twenty-one thousand".