1121222020 has 48 divisors (see below), whose sum is σ = 2381400000. Its totient is φ = 443408000.

The previous prime is 1121221999. The next prime is 1121222051. The reversal of 1121222020 is 202221211.

It is a happy 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, 747231 + ... + 748729.

It is an arithmetic number, because the mean of its divisors is an integer number (49612500).

Almost surely, 2^1121222020 is an apocalyptic number.

1121222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121222020 is an abundant number, since it is smaller than the sum of its proper divisors (1260177980).

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

1121222020 is a wasteful number, since it uses less digits than its factorization.

1121222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1908 (or 1906 counting only the distinct ones).

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

The square root of 1121222020 is about 33484.6534997751. The cubic root of 1121222020 is about 1038.8763813979.

Adding to 1121222020 its reverse (202221211), we get a palindrome (1323443231).

The spelling of 1121222020 in words is "one billion, one hundred twenty-one million, two hundred twenty-two thousand, twenty".