20121220141443 has 20 divisors (see below), whose sum is σ = 30506246428680. Its totient is φ = 13213935611712.

The previous prime is 20121220141427. The next prime is 20121220141457. The reversal of 20121220141443 is 34414102212102.

20121220141443 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 1 + 2 + 201 + 414 + 43 = 666.

It is not a de Polignac number, because 20121220141443 - 2⁴ = 20121220141427 is a prime.

It is a super-2 number, since 2×20121220141443² (a number of 27 digits) contains 22 as substring.

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 (20121220141403) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1853801478 + ... + 1853812331.

It is an arithmetic number, because the mean of its divisors is an integer number (1525312321434).

Almost surely, 2^{20121220141443} is an apocalyptic number.

20121220141443 is a deficient number, since it is larger than the sum of its proper divisors (10385026287237).

20121220141443 is an equidigital number, since it uses as much as digits as its factorization.

20121220141443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707613888 (or 3707613879 counting only the distinct ones).

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

Adding to 20121220141443 its reverse (34414102212102), we get a palindrome (54535322353545).

The spelling of 20121220141443 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty million, one hundred forty-one thousand, four hundred forty-three".