143404213302421 has 4 divisors (see below), whose sum is σ = 143404239327532. Its totient is φ = 143404187277312.

The previous prime is 143404213302367. The next prime is 143404213302431. The reversal of 143404213302421 is 124203312404341.

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

It can be written as a sum of positive squares in 2 ways, for example, as 122464345782321 + 20939867520100 = 11066361^2 + 4576010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143404213302421 is a prime.

It is a super-2 number, since 2×143404213302421² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143404213302431) 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, 1130826 + ... + 16973131.

It is an arithmetic number, because the mean of its divisors is an integer number (35851059831883).

Almost surely, 2^{143404213302421} is an apocalyptic number.

It is an amenable number.

143404213302421 is a deficient number, since it is larger than the sum of its proper divisors (26025111).

143404213302421 is an equidigital number, since it uses as much as digits as its factorization.

143404213302421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26025110.

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 143404213302421 its reverse (124203312404341), we get a palindrome (267607525706762).

The spelling of 143404213302421 in words is "one hundred forty-three trillion, four hundred four billion, two hundred thirteen million, three hundred two thousand, four hundred twenty-one".