1211520232 has 32 divisors (see below), whose sum is σ = 2590245000. Its totient is φ = 526270464.

The previous prime is 1211520187. The next prime is 1211520241. The reversal of 1211520232 is 2320251121.

It can be written as a sum of positive squares in 4 ways, for example, as 1191216196 + 20304036 = 34514^2 + 4506^2 .

It is an unprimeable number.

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, 340857 + ... + 344392.

Almost surely, 2^1211520232 is an apocalyptic number.

It is an amenable number.

1211520232 is an abundant number, since it is smaller than the sum of its proper divisors (1378724768).

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

1211520232 is a wasteful number, since it uses less digits than its factorization.

1211520232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685285 (or 685281 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1211520232 is about 34806.8992011641. The cubic root of 1211520232 is about 1066.0483206944.

Adding to 1211520232 its reverse (2320251121), we get a palindrome (3531771353).

The spelling of 1211520232 in words is "one billion, two hundred eleven million, five hundred twenty thousand, two hundred thirty-two".