213024242143021 has 2 divisors, whose sum is σ = 213024242143022. Its totient is φ = 213024242143020.

The previous prime is 213024242142949. The next prime is 213024242143039. The reversal of 213024242143021 is 120341242420312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184926980673796 + 28097261469225 = 13598786^2 + 5300685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213024242143021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213024242143421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106512121071510 + 106512121071511.

It is an arithmetic number, because the mean of its divisors is an integer number (106512121071511).

Almost surely, 2^{213024242143021} is an apocalyptic number.

It is an amenable number.

213024242143021 is a deficient number, since it is larger than the sum of its proper divisors (1).

213024242143021 is an equidigital number, since it uses as much as digits as its factorization.

213024242143021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 213024242143021 its reverse (120341242420312), we get a palindrome (333365484563333).

The spelling of 213024242143021 in words is "two hundred thirteen trillion, twenty-four billion, two hundred forty-two million, one hundred forty-three thousand, twenty-one".