1212020443 has 8 divisors (see below), whose sum is σ = 1291627008. Its totient is φ = 1134656424.

The previous prime is 1212020437. The next prime is 1212020471. The reversal of 1212020443 is 3440202121.

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

It is not a de Polignac number, because 1212020443 - 2¹³ = 1212012251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1212020443.

It is not an unprimeable number, because it can be changed into a prime (1212020413) 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 7 ways as a sum of consecutive naturals, for example, 559521 + ... + 561682.

It is an arithmetic number, because the mean of its divisors is an integer number (161453376).

Almost surely, 2^1212020443 is an apocalyptic number.

1212020443 is a deficient number, since it is larger than the sum of its proper divisors (79606565).

1212020443 is a wasteful number, since it uses less digits than its factorization.

1212020443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121273.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1212020443 is about 34814.0839747364. The cubic root of 1212020443 is about 1066.1950167517.

Adding to 1212020443 its reverse (3440202121), we get a palindrome (4652222564).

The spelling of 1212020443 in words is "one billion, two hundred twelve million, twenty thousand, four hundred forty-three".