255342211121 has 2 divisors, whose sum is σ = 255342211122. Its totient is φ = 255342211120.

The previous prime is 255342211097. The next prime is 255342211123. The reversal of 255342211121 is 121112243552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 233568257521 + 21773953600 = 483289^2 + 147560^2 .

It is a cyclic number.

It is not a de Polignac number, because 255342211121 - 2¹⁸ = 255341948977 is a prime.

It is a super-2 number, since 2×255342211121² (a number of 24 digits) contains 22 as substring.

Together with 255342211123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (255342211123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127671105560 + 127671105561.

It is an arithmetic number, because the mean of its divisors is an integer number (127671105561).

Almost surely, 2^255342211121 is an apocalyptic number.

It is an amenable number.

255342211121 is a deficient number, since it is larger than the sum of its proper divisors (1).

255342211121 is an equidigital number, since it uses as much as digits as its factorization.

255342211121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 29.

Adding to 255342211121 its reverse (121112243552), we get a palindrome (376454454673).

The spelling of 255342211121 in words is "two hundred fifty-five billion, three hundred forty-two million, two hundred eleven thousand, one hundred twenty-one".