1001220011 has 8 divisors (see below), whose sum is σ = 1092480048. Its totient is φ = 910000000.

The previous prime is 1001220001. The next prime is 1001220013. The reversal of 1001220011 is 1100221001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001220011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001220013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70511 + ... + 83511.

It is an arithmetic number, because the mean of its divisors is an integer number (136560006).

Almost surely, 2^1001220011 is an apocalyptic number.

1001220011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1001220011 is a deficient number, since it is larger than the sum of its proper divisors (91260037).

1001220011 is a wasteful number, since it uses less digits than its factorization.

1001220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20013.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1001220011 is about 31642.0607893987. The cubic root of 1001220011 is about 1000.4065050646.

Adding to 1001220011 its reverse (1100221001), we get a palindrome (2101441012).

The spelling of 1001220011 in words is "one billion, one million, two hundred twenty thousand, eleven".