1221234412 has 12 divisors (see below), whose sum is σ = 2137746016. Its totient is φ = 610449840.

The previous prime is 1221234407. The next prime is 1221234419. The reversal of 1221234412 is 2144321221.

It is not an unprimeable number, because it can be changed into a prime (1221234419) 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, 24639 + ... + 55222.

Almost surely, 2^1221234412 is an apocalyptic number.

It is an amenable number.

1221234412 is a deficient number, since it is larger than the sum of its proper divisors (916511604).

1221234412 is a wasteful number, since it uses less digits than its factorization.

1221234412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83688 (or 83686 counting only the distinct ones).

The product of its digits is 768, while the sum is 22.

The square root of 1221234412 is about 34946.1644819571. The cubic root of 1221234412 is about 1068.8899928015.

Adding to 1221234412 its reverse (2144321221), we get a palindrome (3365555633).

The spelling of 1221234412 in words is "one billion, two hundred twenty-one million, two hundred thirty-four thousand, four hundred twelve".