1121222052 has 18 divisors (see below), whose sum is σ = 2834200278. Its totient is φ = 373740672.

The previous prime is 1121222051. The next prime is 1121222059. The reversal of 1121222052 is 2502221211.

It can be written as a sum of positive squares in only one way, i.e., 871076196 + 250145856 = 29514^2 + 15816^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1121222051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15572493 + ... + 15572564.

It is an arithmetic number, because the mean of its divisors is an integer number (157455571).

Almost surely, 2^1121222052 is an apocalyptic number.

1121222052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1121222052 is an abundant number, since it is smaller than the sum of its proper divisors (1712978226).

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

1121222052 is a wasteful number, since it uses less digits than its factorization.

1121222052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31145067 (or 31145062 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1121222052 is about 33484.6539776059. The cubic root of 1121222052 is about 1038.8763912812.

Adding to 1121222052 its reverse (2502221211), we get a palindrome (3623443263).

The spelling of 1121222052 in words is "one billion, one hundred twenty-one million, two hundred twenty-two thousand, fifty-two".