221220112400143 has 4 divisors (see below), whose sum is σ = 221220421274248. Its totient is φ = 221219803526040.

The previous prime is 221220112400141. The next prime is 221220112400179. The reversal of 221220112400143 is 341004211022122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221220112400143 - 2¹ = 221220112400141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220112400141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153360228 + ... + 154795993.

It is an arithmetic number, because the mean of its divisors is an integer number (55305105318562).

Almost surely, 2^{221220112400143} is an apocalyptic number.

221220112400143 is a deficient number, since it is larger than the sum of its proper divisors (308874105).

221220112400143 is an equidigital number, since it uses as much as digits as its factorization.

221220112400143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308874104.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 221220112400143 its reverse (341004211022122), we get a palindrome (562224323422265).

The spelling of 221220112400143 in words is "two hundred twenty-one trillion, two hundred twenty billion, one hundred twelve million, four hundred thousand, one hundred forty-three".