55123243111 has 2 divisors, whose sum is σ = 55123243112. Its totient is φ = 55123243110.

The previous prime is 55123243081. The next prime is 55123243127. The reversal of 55123243111 is 11134232155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55123243111 - 2¹³ = 55123234919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55123243111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55123247111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27561621555 + 27561621556.

It is an arithmetic number, because the mean of its divisors is an integer number (27561621556).

Almost surely, 2^55123243111 is an apocalyptic number.

55123243111 is a deficient number, since it is larger than the sum of its proper divisors (1).

55123243111 is an equidigital number, since it uses as much as digits as its factorization.

55123243111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 28.

Adding to 55123243111 its reverse (11134232155), we get a palindrome (66257475266).

The spelling of 55123243111 in words is "fifty-five billion, one hundred twenty-three million, two hundred forty-three thousand, one hundred eleven".