221420010289 has 2 divisors, whose sum is σ = 221420010290. Its totient is φ = 221420010288.

The previous prime is 221420010281. The next prime is 221420010293. The reversal of 221420010289 is 982010024122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191399250064 + 30020760225 = 437492^2 + 173265^2 .

It is a cyclic number.

It is not a de Polignac number, because 221420010289 - 2³ = 221420010281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221420010289.

It is not a weakly prime, because it can be changed into another prime (221420010281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110710005144 + 110710005145.

It is an arithmetic number, because the mean of its divisors is an integer number (110710005145).

Almost surely, 2^221420010289 is an apocalyptic number.

It is an amenable number.

221420010289 is a deficient number, since it is larger than the sum of its proper divisors (1).

221420010289 is an equidigital number, since it uses as much as digits as its factorization.

221420010289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 31.

The spelling of 221420010289 in words is "two hundred twenty-one billion, four hundred twenty million, ten thousand, two hundred eighty-nine".