221212124141 has 2 divisors, whose sum is σ = 221212124142. Its totient is φ = 221212124140.

The previous prime is 221212124117. The next prime is 221212124153. The reversal of 221212124141 is 141421212122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188858907241 + 32353216900 = 434579^2 + 179870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221212124141 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221212124041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110606062070 + 110606062071.

It is an arithmetic number, because the mean of its divisors is an integer number (110606062071).

Almost surely, 2^221212124141 is an apocalyptic number.

It is an amenable number.

221212124141 is a deficient number, since it is larger than the sum of its proper divisors (1).

221212124141 is an equidigital number, since it uses as much as digits as its factorization.

221212124141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 512, while the sum is 23.

Adding to 221212124141 its reverse (141421212122), we get a palindrome (362633336263).

The spelling of 221212124141 in words is "two hundred twenty-one billion, two hundred twelve million, one hundred twenty-four thousand, one hundred forty-one".