55212112211 has 2 divisors, whose sum is σ = 55212112212. Its totient is φ = 55212112210.

The previous prime is 55212112169. The next prime is 55212112279. The reversal of 55212112211 is 11221121255.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55212112211 - 2⁶ = 55212112147 is a prime.

It is not a weakly prime, because it can be changed into another prime (55212117211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27606056105 + 27606056106.

It is an arithmetic number, because the mean of its divisors is an integer number (27606056106).

Almost surely, 2^55212112211 is an apocalyptic number.

55212112211 is a deficient number, since it is larger than the sum of its proper divisors (1).

55212112211 is an equidigital number, since it uses as much as digits as its factorization.

55212112211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 400, while the sum is 23.

Adding to 55212112211 its reverse (11221121255), we get a palindrome (66433233466).

The spelling of 55212112211 in words is "fifty-five billion, two hundred twelve million, one hundred twelve thousand, two hundred eleven".