1221012032 has 14 divisors (see below), whose sum is σ = 2422945878. Its totient is φ = 610505984.

The previous prime is 1221012007. The next prime is 1221012049. The reversal of 1221012032 is 2302101221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1214940736 + 6071296 = 34856^2 + 2464^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1221011998 and 1221012016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9539093 + ... + 9539220.

Almost surely, 2^1221012032 is an apocalyptic number.

It is an amenable number.

1221012032 is a deficient number, since it is larger than the sum of its proper divisors (1201933846).

1221012032 is an equidigital number, since it uses as much as digits as its factorization.

1221012032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19078325 (or 19078315 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1221012032 is about 34942.9825859213. The cubic root of 1221012032 is about 1068.8251092204.

Adding to 1221012032 its reverse (2302101221), we get a palindrome (3523113253).

It can be divided in two parts, 12210 and 12032, that added together give a palindrome (24242).

The spelling of 1221012032 in words is "one billion, two hundred twenty-one million, twelve thousand, thirty-two".