1121222120 has 16 divisors (see below), whose sum is σ = 2522749860. Its totient is φ = 448488832.

The previous prime is 1121222117. The next prime is 1121222171. The reversal of 1121222120 is 212221211.

It can be written as a sum of positive squares in 2 ways, for example, as 1074135076 + 47087044 = 32774^2 + 6862^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1121222095 and 1121222104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14015237 + ... + 14015316.

Almost surely, 2^1121222120 is an apocalyptic number.

1121222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121222120 is an abundant number, since it is smaller than the sum of its proper divisors (1401527740).

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

1121222120 is a wasteful number, since it uses less digits than its factorization.

1121222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28030564 (or 28030560 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1121222120 is about 33484.6549929964. The cubic root of 1121222120 is about 1038.8764122832.

Adding to 1121222120 its reverse (212221211), we get a palindrome (1333443331).

Subtracting from 1121222120 its reverse (212221211), we obtain a palindrome (909000909).

It can be divided in two parts, 1 and 121222120, that added together give a palindrome (121222121).

The spelling of 1121222120 in words is "one billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty".