1121151220 has 48 divisors (see below), whose sum is σ = 2718535680. Its totient is φ = 380427264.

The previous prime is 1121151211. The next prime is 1121151233. The reversal of 1121151220 is 221511211.

It is a junction number, because it is equal to n+sod(n) for n = 1121151194 and 1121151203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27700 + ... + 54859.

It is an arithmetic number, because the mean of its divisors is an integer number (56636160).

Almost surely, 2^1121151220 is an apocalyptic number.

1121151220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121151220 is an abundant number, since it is smaller than the sum of its proper divisors (1597384460).

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

1121151220 is a wasteful number, since it uses less digits than its factorization.

1121151220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82672 (or 82670 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 1121151220 is about 33483.5962823589. The cubic root of 1121151220 is about 1038.8545141868.

Adding to 1121151220 its reverse (221511211), we get a palindrome (1342662431).

The spelling of 1121151220 in words is "one billion, one hundred twenty-one million, one hundred fifty-one thousand, two hundred twenty".