1220302081 has 2 divisors, whose sum is σ = 1220302082. Its totient is φ = 1220302080.

The previous prime is 1220302067. The next prime is 1220302129. The reversal of 1220302081 is 1802030221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 708411456 + 511890625 = 26616^2 + 22625^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220302081 - 2¹¹ = 1220300033 is a prime.

It is a super-2 number, since 2×1220302081² = 2978274337785861122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1220302781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610151040 + 610151041.

It is an arithmetic number, because the mean of its divisors is an integer number (610151041).

Almost surely, 2^1220302081 is an apocalyptic number.

It is an amenable number.

1220302081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220302081 is an equidigital number, since it uses as much as digits as its factorization.

1220302081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1220302081 is about 34932.8224024341. The cubic root of 1220302081 is about 1068.6179148188.

The spelling of 1220302081 in words is "one billion, two hundred twenty million, three hundred two thousand, eighty-one".