1221443144343 has 24 divisors (see below), whose sum is σ = 1831394373120. Its totient is φ = 783625412880.

The previous prime is 1221443144303. The next prime is 1221443144371. The reversal of 1221443144343 is 3434413441221.

1221443144343 is a `hidden beast` number, since 1 + 2 + 2 + 144 + 31 + 443 + 43 = 666.

It is not a de Polignac number, because 1221443144343 - 2¹⁸ = 1221442882199 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221443144298 and 1221443144307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221443144303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12178921 + ... + 12278802.

It is an arithmetic number, because the mean of its divisors is an integer number (76308098880).

Almost surely, 2^{1221443144343} is an apocalyptic number.

1221443144343 is a deficient number, since it is larger than the sum of its proper divisors (609951228777).

1221443144343 is a wasteful number, since it uses less digits than its factorization.

1221443144343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24457939 (or 24457936 counting only the distinct ones).

The product of its digits is 110592, while the sum is 36.

Adding to 1221443144343 its reverse (3434413441221), we get a palindrome (4655856585564).

The spelling of 1221443144343 in words is "one trillion, two hundred twenty-one billion, four hundred forty-three million, one hundred forty-four thousand, three hundred forty-three".