55821212141 has 2 divisors, whose sum is σ = 55821212142. Its totient is φ = 55821212140.

The previous prime is 55821212077. The next prime is 55821212173. The reversal of 55821212141 is 14121212855.

It is an a-pointer prime, because the next prime (55821212173) can be obtained adding 55821212141 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43658430916 + 12162781225 = 208946^2 + 110285^2 .

It is a cyclic number.

It is not a de Polignac number, because 55821212141 - 2⁶ = 55821212077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55821212098 and 55821212107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55821212641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27910606070 + 27910606071.

It is an arithmetic number, because the mean of its divisors is an integer number (27910606071).

Almost surely, 2^55821212141 is an apocalyptic number.

It is an amenable number.

55821212141 is a deficient number, since it is larger than the sum of its proper divisors (1).

55821212141 is an equidigital number, since it uses as much as digits as its factorization.

55821212141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6400, while the sum is 32.

Adding to 55821212141 its reverse (14121212855), we get a palindrome (69942424996).

The spelling of 55821212141 in words is "fifty-five billion, eight hundred twenty-one million, two hundred twelve thousand, one hundred forty-one".