1221433243488 has 36 divisors (see below), whose sum is σ = 3473450786988. Its totient is φ = 407144414400.

The previous prime is 1221433243487. The next prime is 1221433243493. The reversal of 1221433243488 is 8843423341221.

1221433243488 is a `hidden beast` number, since 1 + 2 + 2 + 143 + 3 + 24 + 3 + 488 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1221433243488² (a number of 25 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221433243487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2120543538 + ... + 2120544113.

It is an arithmetic number, because the mean of its divisors is an integer number (96484744083).

Almost surely, 2^{1221433243488} is an apocalyptic number.

1221433243488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1221433243488 is an abundant number, since it is smaller than the sum of its proper divisors (2252017543500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221433243488 is a wasteful number, since it uses less digits than its factorization.

1221433243488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4241087667 (or 4241087656 counting only the distinct ones).

The product of its digits is 884736, while the sum is 45.

The spelling of 1221433243488 in words is "one trillion, two hundred twenty-one billion, four hundred thirty-three million, two hundred forty-three thousand, four hundred eighty-eight".