988740000221 has 2 divisors, whose sum is σ = 988740000222. Its totient is φ = 988740000220.

The previous prime is 988740000197. The next prime is 988740000271. The reversal of 988740000221 is 122000047889.

988740000221 = 703114² + 703115².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 494370703225 + 494369296996 = 703115^2 + 703114^2 .

It is a cyclic number.

It is not a de Polignac number, because 988740000221 - 2¹⁴ = 988739983837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (988740000271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494370000110 + 494370000111.

It is an arithmetic number, because the mean of its divisors is an integer number (494370000111).

Almost surely, 2^988740000221 is an apocalyptic number.

988740000221 is the 703115-th centered square number.

It is an amenable number.

988740000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

988740000221 is an equidigital number, since it uses as much as digits as its factorization.

988740000221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 41.

The spelling of 988740000221 in words is "nine hundred eighty-eight billion, seven hundred forty million, two hundred twenty-one", and thus it is an aban number.