213465026034521 has 2 divisors, whose sum is σ = 213465026034522. Its totient is φ = 213465026034520.

The previous prime is 213465026034493. The next prime is 213465026034527. The reversal of 213465026034521 is 125430620564312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150981771551296 + 62483254483225 = 12287464^2 + 7904635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213465026034521 is a prime.

It is not a weakly prime, because it can be changed into another prime (213465026034527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106732513017260 + 106732513017261.

It is an arithmetic number, because the mean of its divisors is an integer number (106732513017261).

Almost surely, 2^{213465026034521} is an apocalyptic number.

It is an amenable number.

213465026034521 is a deficient number, since it is larger than the sum of its proper divisors (1).

213465026034521 is an equidigital number, since it uses as much as digits as its factorization.

213465026034521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1036800, while the sum is 44.

Adding to 213465026034521 its reverse (125430620564312), we get a palindrome (338895646598833).

The spelling of 213465026034521 in words is "two hundred thirteen trillion, four hundred sixty-five billion, twenty-six million, thirty-four thousand, five hundred twenty-one".