221136218839 has 2 divisors, whose sum is σ = 221136218840. Its totient is φ = 221136218838.

The previous prime is 221136218837. The next prime is 221136218881. The reversal of 221136218839 is 938812631122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221136218839 - 2¹ = 221136218837 is a prime.

Together with 221136218837, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221136218837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110568109419 + 110568109420.

It is an arithmetic number, because the mean of its divisors is an integer number (110568109420).

Almost surely, 2^221136218839 is an apocalyptic number.

221136218839 is a deficient number, since it is larger than the sum of its proper divisors (1).

221136218839 is an equidigital number, since it uses as much as digits as its factorization.

221136218839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The spelling of 221136218839 in words is "two hundred twenty-one billion, one hundred thirty-six million, two hundred eighteen thousand, eight hundred thirty-nine".