1221010097 has 2 divisors, whose sum is σ = 1221010098. Its totient is φ = 1221010096.

The previous prime is 1221010081. The next prime is 1221010103. The reversal of 1221010097 is 7900101221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1157632576 + 63377521 = 34024^2 + 7961^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221010097 - 2⁴ = 1221010081 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221010897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610505048 + 610505049.

It is an arithmetic number, because the mean of its divisors is an integer number (610505049).

Almost surely, 2^1221010097 is an apocalyptic number.

It is an amenable number.

1221010097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221010097 is an equidigital number, since it uses as much as digits as its factorization.

1221010097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 1221010097 is about 34942.9548979476. The cubic root of 1221010097 is about 1068.8245446129.

The spelling of 1221010097 in words is "one billion, two hundred twenty-one million, ten thousand, ninety-seven".