1001020121011 has 16 divisors (see below), whose sum is σ = 1063290758400. Its totient is φ = 940343718688.

The previous prime is 1001020120957. The next prime is 1001020121021. The reversal of 1001020121011 is 1101210201001.

It is a cyclic number.

It is not a de Polignac number, because 1001020121011 - 2⁷ = 1001020120883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001020121021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1020825 + ... + 1744741.

It is an arithmetic number, because the mean of its divisors is an integer number (66455672400).

Almost surely, 2^{1001020121011} is an apocalyptic number.

1001020121011 is a deficient number, since it is larger than the sum of its proper divisors (62270637389).

1001020121011 is a wasteful number, since it uses less digits than its factorization.

1001020121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725018.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1001020121011 its reverse (1101210201001), we get a palindrome (2102230322012).

The spelling of 1001020121011 in words is "one trillion, one billion, twenty million, one hundred twenty-one thousand, eleven".