1001220078949 has 2 divisors, whose sum is σ = 1001220078950. Its totient is φ = 1001220078948.

The previous prime is 1001220078923. The next prime is 1001220079003. The reversal of 1001220078949 is 9498700221001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 626361444900 + 374858634049 = 791430^2 + 612257^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001220078949 - 2¹⁷ = 1001219947877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001226078949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500610039474 + 500610039475.

It is an arithmetic number, because the mean of its divisors is an integer number (500610039475).

Almost surely, 2^{1001220078949} is an apocalyptic number.

It is an amenable number.

1001220078949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001220078949 is an equidigital number, since it uses as much as digits as its factorization.

1001220078949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 1001220078949 in words is "one trillion, one billion, two hundred twenty million, seventy-eight thousand, nine hundred forty-nine".