265553212123 has 2 divisors, whose sum is σ = 265553212124. Its totient is φ = 265553212122.

The previous prime is 265553212103. The next prime is 265553212129. The reversal of 265553212123 is 321212355562.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 265553212123 - 2⁵ = 265553212091 is a prime.

It is not a weakly prime, because it can be changed into another prime (265553212129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132776606061 + 132776606062.

It is an arithmetic number, because the mean of its divisors is an integer number (132776606062).

Almost surely, 2^265553212123 is an apocalyptic number.

265553212123 is a deficient number, since it is larger than the sum of its proper divisors (1).

265553212123 is an equidigital number, since it uses as much as digits as its factorization.

265553212123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 37.

Adding to 265553212123 its reverse (321212355562), we get a palindrome (586765567685).

The spelling of 265553212123 in words is "two hundred sixty-five billion, five hundred fifty-three million, two hundred twelve thousand, one hundred twenty-three".