1221244432413 has 8 divisors (see below), whose sum is σ = 1724109787008. Its totient is φ = 766271016384.

The previous prime is 1221244432403. The next prime is 1221244432501. The reversal of 1221244432413 is 3142344421221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1221244432413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221244432403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11972984581 + ... + 11972984682.

It is an arithmetic number, because the mean of its divisors is an integer number (215513723376).

Almost surely, 2^{1221244432413} is an apocalyptic number.

It is an amenable number.

1221244432413 is a deficient number, since it is larger than the sum of its proper divisors (502865354595).

1221244432413 is a wasteful number, since it uses less digits than its factorization.

1221244432413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23945969283.

The product of its digits is 36864, while the sum is 33.

Adding to 1221244432413 its reverse (3142344421221), we get a palindrome (4363588853634).

The spelling of 1221244432413 in words is "one trillion, two hundred twenty-one billion, two hundred forty-four million, four hundred thirty-two thousand, four hundred thirteen".