1121220312 has 32 divisors (see below), whose sum is σ = 2967937200. Its totient is φ = 351755264.

The previous prime is 1121220311. The next prime is 1121220323. The reversal of 1121220312 is 2130221211.

It is a junction number, because it is equal to n+sod(n) for n = 1121220291 and 1121220300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121220311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1373637 + ... + 1374452.

Almost surely, 2^1121220312 is an apocalyptic number.

1121220312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1121220312 is an abundant number, since it is smaller than the sum of its proper divisors (1846716888).

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

1121220312 is a wasteful number, since it uses less digits than its factorization.

1121220312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2748115 (or 2748111 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1121220312 is about 33484.6279955445. The cubic root of 1121220312 is about 1038.8758538778.

Adding to 1121220312 its reverse (2130221211), we get a palindrome (3251441523).

The spelling of 1121220312 in words is "one billion, one hundred twenty-one million, two hundred twenty thousand, three hundred twelve".