1121000021200 has 240 divisors, whose sum is σ = 2762139719680. Its totient is φ = 437088960000.

The previous prime is 1121000021161. The next prime is 1121000021213. The reversal of 1121000021200 is 21200001211.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1776544885 + ... + 1776545515.

Almost surely, 2^{1121000021200} is an apocalyptic number.

1121000021200 is a gapful number since it is divisible by the number (10) 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 1121000021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1381069859840).

1121000021200 is an abundant number, since it is smaller than the sum of its proper divisors (1641139698480).

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

1121000021200 is a wasteful number, since it uses less digits than its factorization.

1121000021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306 (or 1295 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1121000021200 its reverse (21200001211), we get a palindrome (1142200022411).

The spelling of 1121000021200 in words is "one trillion, one hundred twenty-one billion, twenty-one thousand, two hundred".