1201021069 has 2 divisors, whose sum is σ = 1201021070. Its totient is φ = 1201021068.

The previous prime is 1201021067. The next prime is 1201021111. The reversal of 1201021069 is 9601201021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1079911044 + 121110025 = 32862^2 + 11005^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201021069 - 2¹ = 1201021067 is a prime.

It is a super-2 number, since 2×1201021069² = 2884903216363805522, which contains 22 as substring.

Together with 1201021067, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201021067) 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, 600510534 + 600510535.

It is an arithmetic number, because the mean of its divisors is an integer number (600510535).

Almost surely, 2^1201021069 is an apocalyptic number.

It is an amenable number.

1201021069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201021069 is an equidigital number, since it uses as much as digits as its factorization.

1201021069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1201021069 is about 34655.7508791831. The cubic root of 1201021069 is about 1062.9598858814.

The spelling of 1201021069 in words is "one billion, two hundred one million, twenty-one thousand, sixty-nine".