1121121101220 has 48 divisors (see below), whose sum is σ = 3146967427968. Its totient is φ = 298220070400.

The previous prime is 1121121101167. The next prime is 1121121101227. The reversal of 1121121101220 is 221011211211.

It is a happy number.

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 1121121101220.

It is not an unprimeable number, because it can be changed into a prime (1121121101227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23274384 + ... + 23322503.

It is an arithmetic number, because the mean of its divisors is an integer number (65561821416).

Almost surely, 2^{1121121101220} is an apocalyptic number.

1121121101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121121101220 is an abundant number, since it is smaller than the sum of its proper divisors (2025846326748).

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

1121121101220 is a wasteful number, since it uses less digits than its factorization.

1121121101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46597300 (or 46597298 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1121121101220 its reverse (221011211211), we get a palindrome (1342132312431).

The spelling of 1121121101220 in words is "one trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred one thousand, two hundred twenty".