221210120985827 has 2 divisors, whose sum is σ = 221210120985828. Its totient is φ = 221210120985826.

The previous prime is 221210120985769. The next prime is 221210120985829. The reversal of 221210120985827 is 728589021012122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221210120985827 - 2²² = 221210116791523 is a prime.

Together with 221210120985829, 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 (221210120985829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605060492913 + 110605060492914.

It is an arithmetic number, because the mean of its divisors is an integer number (110605060492914).

Almost surely, 2^{221210120985827} is an apocalyptic number.

221210120985827 is a deficient number, since it is larger than the sum of its proper divisors (1).

221210120985827 is an equidigital number, since it uses as much as digits as its factorization.

221210120985827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 50.

Adding to 221210120985827 its reverse (728589021012122), we get a palindrome (949799141997949).

The spelling of 221210120985827 in words is "two hundred twenty-one trillion, two hundred ten billion, one hundred twenty million, nine hundred eighty-five thousand, eight hundred twenty-seven".