2142330043421 has 2 divisors, whose sum is σ = 2142330043422. Its totient is φ = 2142330043420.

The previous prime is 2142330043397. The next prime is 2142330043493. The reversal of 2142330043421 is 1243400332412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1961509490521 + 180820552900 = 1400539^2 + 425230^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142330043421 - 2¹⁰ = 2142330042397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2142330049421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071165021710 + 1071165021711.

It is an arithmetic number, because the mean of its divisors is an integer number (1071165021711).

Almost surely, 2^{2142330043421} is an apocalyptic number.

It is an amenable number.

2142330043421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142330043421 is an equidigital number, since it uses as much as digits as its factorization.

2142330043421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 2142330043421 its reverse (1243400332412), we get a palindrome (3385730375833).

The spelling of 2142330043421 in words is "two trillion, one hundred forty-two billion, three hundred thirty million, forty-three thousand, four hundred twenty-one".