221989405147 has 2 divisors, whose sum is σ = 221989405148. Its totient is φ = 221989405146.

The previous prime is 221989405111. The next prime is 221989405171. The reversal of 221989405147 is 741504989122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221989405147 - 2¹¹ = 221989403099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221989405094 and 221989405103.

It is not a weakly prime, because it can be changed into another prime (221989405177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110994702573 + 110994702574.

It is an arithmetic number, because the mean of its divisors is an integer number (110994702574).

Almost surely, 2^221989405147 is an apocalyptic number.

221989405147 is a deficient number, since it is larger than the sum of its proper divisors (1).

221989405147 is an equidigital number, since it uses as much as digits as its factorization.

221989405147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 221989405147 in words is "two hundred twenty-one billion, nine hundred eighty-nine million, four hundred five thousand, one hundred forty-seven".