1121022012 has 24 divisors (see below), whose sum is σ = 2853510912. Its totient is φ = 339703600.

The previous prime is 1121022011. The next prime is 1121022043. The reversal of 1121022012 is 2102201211.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121022011) 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 7 ways as a sum of consecutive naturals, for example, 4246164 + ... + 4246427.

It is an arithmetic number, because the mean of its divisors is an integer number (118896288).

Almost surely, 2^1121022012 is an apocalyptic number.

1121022012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1121022012 is an abundant number, since it is smaller than the sum of its proper divisors (1732488900).

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

1121022012 is a wasteful number, since it uses less digits than its factorization.

1121022012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8492609 (or 8492607 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1121022012 is about 33481.6668043871. Note that the first 3 decimals coincide. The cubic root of 1121022012 is about 1038.8146047709.

Adding to 1121022012 its reverse (2102201211), we get a palindrome (3223223223).

It can be divided in two parts, 11 and 21022012, that multiplied together give a palindrome (231242132).

The spelling of 1121022012 in words is "one billion, one hundred twenty-one million, twenty-two thousand, twelve".