1121220220000 has 120 divisors (see below), whose sum is σ = 2789367273000. Its totient is φ = 443448192000.

The previous prime is 1121220219943. The next prime is 1121220220009. The reversal of 1121220220000 is 220221211.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121220220009) 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, 1465051 + ... + 2094949.

It is an arithmetic number, because the mean of its divisors is an integer number (23244727275).

Almost surely, 2^{1121220220000} is an apocalyptic number.

1121220220000 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 1121220220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1394683636500).

1121220220000 is an abundant number, since it is smaller than the sum of its proper divisors (1668147053000).

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

1121220220000 is an frugal number, since it uses more digits than its factorization.

1121220220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630018 (or 629995 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1121220220000 its reverse (220221211), we get a palindrome (1121440441211).

The spelling of 1121220220000 in words is "one trillion, one hundred twenty-one billion, two hundred twenty million, two hundred twenty thousand".