1221443022412 has 24 divisors (see below), whose sum is σ = 2187841672016. Its totient is φ = 596353278528.

The previous prime is 1221443022409. The next prime is 1221443022479. The reversal of 1221443022412 is 2142203441221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361323 + ... + 1604194.

Almost surely, 2^{1221443022412} is an apocalyptic number.

It is an amenable number.

1221443022412 is a deficient number, since it is larger than the sum of its proper divisors (966398649604).

1221443022412 is a wasteful number, since it uses less digits than its factorization.

1221443022412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969177 (or 1969175 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 1221443022412 its reverse (2142203441221), we get a palindrome (3363646463633).

The spelling of 1221443022412 in words is "one trillion, two hundred twenty-one billion, four hundred forty-three million, twenty-two thousand, four hundred twelve".