1010001021011 has 4 divisors (see below), whose sum is σ = 1010078828112. Its totient is φ = 1009923213912.

The previous prime is 1010001020999. The next prime is 1010001021013. The reversal of 1010001021011 is 1101201000101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1010001021011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1010001021011.

It is not an unprimeable number, because it can be changed into a prime (1010001021013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38884076 + ... + 38910041.

It is an arithmetic number, because the mean of its divisors is an integer number (252519707028).

Almost surely, 2^{1010001021011} is an apocalyptic number.

1010001021011 is a deficient number, since it is larger than the sum of its proper divisors (77807101).

1010001021011 is an equidigital number, since it uses as much as digits as its factorization.

1010001021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77807100.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 1010001021011 its reverse (1101201000101), we get a palindrome (2111202021112).

The spelling of 1010001021011 in words is "one trillion, ten billion, one million, twenty-one thousand, eleven".