143401444421221 has 12 divisors (see below), whose sum is σ = 166849899943788. Its totient is φ = 122889016041792.

The previous prime is 143401444421173. The next prime is 143401444421233. The reversal of 143401444421221 is 122124444104341.

It can be written as a sum of positive squares in 2 ways, for example, as 46536204845025 + 96865239576196 = 6821745^2 + 9842014^2 .

It is not a de Polignac number, because 143401444421221 - 2¹⁹ = 143401443896933 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 (143401444421021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 315338896 + ... + 315793321.

It is an arithmetic number, because the mean of its divisors is an integer number (13904158328649).

Almost surely, 2^{143401444421221} is an apocalyptic number.

It is an amenable number.

143401444421221 is a deficient number, since it is larger than the sum of its proper divisors (23448455522567).

143401444421221 is an equidigital number, since it uses as much as digits as its factorization.

143401444421221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631136868 (or 631136861 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 37.

Adding to 143401444421221 its reverse (122124444104341), we get a palindrome (265525888525562).

The spelling of 143401444421221 in words is "one hundred forty-three trillion, four hundred one billion, four hundred forty-four million, four hundred twenty-one thousand, two hundred twenty-one".