2001220069249 has 2 divisors, whose sum is σ = 2001220069250. Its totient is φ = 2001220069248.

The previous prime is 2001220069237. The next prime is 2001220069333. The reversal of 2001220069249 is 9429600221002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1865477930625 + 135742138624 = 1365825^2 + 368432^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001220069249 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001220069649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000610034624 + 1000610034625.

It is an arithmetic number, because the mean of its divisors is an integer number (1000610034625).

Almost surely, 2^{2001220069249} is an apocalyptic number.

It is an amenable number.

2001220069249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001220069249 is an equidigital number, since it uses as much as digits as its factorization.

2001220069249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 2001220069249 in words is "two trillion, one billion, two hundred twenty million, sixty-nine thousand, two hundred forty-nine".