1145221112 has 16 divisors (see below), whose sum is σ = 2454045360. Its totient is φ = 490809024.

The previous prime is 1145221109. The next prime is 1145221141. The reversal of 1145221112 is 2111225411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10225133 + ... + 10225244.

It is an arithmetic number, because the mean of its divisors is an integer number (153377835).

Almost surely, 2^1145221112 is an apocalyptic number.

It is an amenable number.

1145221112 is an abundant number, since it is smaller than the sum of its proper divisors (1308824248).

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

1145221112 is a wasteful number, since it uses less digits than its factorization.

1145221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20450390 (or 20450386 counting only the distinct ones).

The product of its digits is 160, while the sum is 20.

The square root of 1145221112 is about 33841.1157026479. The cubic root of 1145221112 is about 1046.2362944990.

Adding to 1145221112 its reverse (2111225411), we get a palindrome (3256446523).

The spelling of 1145221112 in words is "one billion, one hundred forty-five million, two hundred twenty-one thousand, one hundred twelve".