2001220069 has 2 divisors, whose sum is σ = 2001220070. Its totient is φ = 2001220068.

The previous prime is 2001220061. The next prime is 2001220079. The reversal of 2001220069 is 9600221002.

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., 1998537025 + 2683044 = 44705^2 + 1638^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001220069 - 2³ = 2001220061 is a prime.

It is a super-2 number, since 2×2001220069² = 8009763529136729522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001220061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000610034 + 1000610035.

It is an arithmetic number, because the mean of its divisors is an integer number (1000610035).

Almost surely, 2^2001220069 is an apocalyptic number.

It is an amenable number.

2001220069 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001220069 is an equidigital number, since it uses as much as digits as its factorization.

2001220069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 2001220069 is about 44734.9982563988. The cubic root of 2001220069 is about 1260.1771962518.

The spelling of 2001220069 in words is "two billion, one million, two hundred twenty thousand, sixty-nine".