1151223212 has 12 divisors (see below), whose sum is σ = 2044710360. Its totient is φ = 567020256.

The previous prime is 1151223211. The next prime is 1151223239. The reversal of 1151223212 is 2123221511.

It is not an unprimeable number, because it can be changed into a prime (1151223211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2147537 + ... + 2148072.

It is an arithmetic number, because the mean of its divisors is an integer number (170392530).

Almost surely, 2^1151223212 is an apocalyptic number.

It is an amenable number.

1151223212 is a deficient number, since it is larger than the sum of its proper divisors (893487148).

1151223212 is a wasteful number, since it uses less digits than its factorization.

1151223212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4295680 (or 4295678 counting only the distinct ones).

The product of its digits is 240, while the sum is 20.

The square root of 1151223212 is about 33929.6803993200. The cubic root of 1151223212 is about 1048.0608842802.

Adding to 1151223212 its reverse (2123221511), we get a palindrome (3274444723).

The spelling of 1151223212 in words is "one billion, one hundred fifty-one million, two hundred twenty-three thousand, two hundred twelve".