1002001011 has 32 divisors (see below), whose sum is σ = 1518048000. Its totient is φ = 582314880.

The previous prime is 1002000997. The next prime is 1002001057. The reversal of 1002001011 is 1101002001.

It is not a de Polignac number, because 1002001011 - 2⁶ = 1002000947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1002001211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139080 + ... + 146106.

It is an arithmetic number, because the mean of its divisors is an integer number (47439000).

Almost surely, 2^1002001011 is an apocalyptic number.

1002001011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1002001011 is a deficient number, since it is larger than the sum of its proper divisors (516046989).

1002001011 is a wasteful number, since it uses less digits than its factorization.

1002001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7219.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 1002001011 is about 31654.3995520370. The cubic root of 1002001011 is about 1000.6665592667. Note that the first 3 decimals are identical.

Adding to 1002001011 its reverse (1101002001), we get a palindrome (2103003012).

The spelling of 1002001011 in words is "one billion, two million, one thousand, eleven".