1221244432412 has 12 divisors (see below), whose sum is σ = 2140069748040. Its totient is φ = 609795932976.

The previous prime is 1221244432403. The next prime is 1221244432501. The reversal of 1221244432412 is 2142344421221.

It is a super-2 number, since 2×1221244432412² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206567483 + ... + 206573394.

It is an arithmetic number, because the mean of its divisors is an integer number (178339145670).

Almost surely, 2^{1221244432412} is an apocalyptic number.

It is an amenable number.

1221244432412 is a deficient number, since it is larger than the sum of its proper divisors (918825315628).

1221244432412 is a wasteful number, since it uses less digits than its factorization.

1221244432412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413141620 (or 413141618 counting only the distinct ones).

The product of its digits is 24576, while the sum is 32.

Adding to 1221244432412 its reverse (2142344421221), we get a palindrome (3363588853633).

The spelling of 1221244432412 in words is "one trillion, two hundred twenty-one billion, two hundred forty-four million, four hundred thirty-two thousand, four hundred twelve".