1212221122443 has 16 divisors (see below), whose sum is σ = 1844420528160. Its totient is φ = 786305592288.

The previous prime is 1212221122423. The next prime is 1212221122477. The reversal of 1212221122443 is 3442211222121.

1212221122443 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 2 + 211 + 2 + 2 + 443 = 666.

It is not a de Polignac number, because 1212221122443 - 2⁹ = 1212221121931 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1212221122423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 606716280 + ... + 606718277.

It is an arithmetic number, because the mean of its divisors is an integer number (115276283010).

Almost surely, 2^{1212221122443} is an apocalyptic number.

1212221122443 is a deficient number, since it is larger than the sum of its proper divisors (632199405717).

1212221122443 is a wasteful number, since it uses less digits than its factorization.

1212221122443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213434603 (or 1213434597 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

Adding to 1212221122443 its reverse (3442211222121), we get a palindrome (4654432344564).

The spelling of 1212221122443 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, one hundred twenty-two thousand, four hundred forty-three".