1121220011220 has 96 divisors (see below), whose sum is σ = 3276278046720. Its totient is φ = 285960428160.

The previous prime is 1121220011159. The next prime is 1121220011227. The reversal of 1121220011220 is 221100221211.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1121220011220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121220011227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13868715 + ... + 13949325.

It is an arithmetic number, because the mean of its divisors is an integer number (34127896320).

Almost surely, 2^{1121220011220} is an apocalyptic number.

1121220011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121220011220 is an abundant number, since it is smaller than the sum of its proper divisors (2155058035500).

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

1121220011220 is a wasteful number, since it uses less digits than its factorization.

1121220011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90725 (or 90723 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1121220011220 its reverse (221100221211), we get a palindrome (1342320232431).

The spelling of 1121220011220 in words is "one trillion, one hundred twenty-one billion, two hundred twenty million, eleven thousand, two hundred twenty".