1121011203204 has 84 divisors (see below), whose sum is σ = 2944723735296. Its totient is φ = 373236573168.

The previous prime is 1121011203187. The next prime is 1121011203209. The reversal of 1121011203204 is 4023021101211.

1121011203204 is a `hidden beast` number, since 11 + 210 + 1 + 120 + 320 + 4 = 666.

It is a super-2 number, since 2×1121011203204² (a number of 25 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1121011203209) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2293777 + ... + 2739239.

It is an arithmetic number, because the mean of its divisors is an integer number (35056234944).

Almost surely, 2^{1121011203204} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121011203204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1472361867648).

1121011203204 is an abundant number, since it is smaller than the sum of its proper divisors (1823712532092).

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

1121011203204 is an equidigital number, since it uses as much as digits as its factorization.

1121011203204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446348 (or 446331 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1121011203204 its reverse (4023021101211), we get a palindrome (5144032304415).

The spelling of 1121011203204 in words is "one trillion, one hundred twenty-one billion, eleven million, two hundred three thousand, two hundred four".