20010121011011 has 8 divisors (see below), whose sum is σ = 20015215065360. Its totient is φ = 20005027372768.

The previous prime is 20010121011007. The next prime is 20010121011037. The reversal of 20010121011011 is 11011012101002.

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

It is a cyclic number.

It is not a de Polignac number, because 20010121011011 - 2² = 20010121011007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010121010983 and 20010121011001.

It is not an unprimeable number, because it can be changed into a prime (20010121011091) 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 7 ways as a sum of consecutive naturals, for example, 110807885 + ... + 110988321.

It is an arithmetic number, because the mean of its divisors is an integer number (2501901883170).

Almost surely, 2^{20010121011011} is an apocalyptic number.

20010121011011 is a deficient number, since it is larger than the sum of its proper divisors (5094054349).

20010121011011 is a wasteful number, since it uses less digits than its factorization.

20010121011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208053.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 20010121011011 its reverse (11011012101002), we get a palindrome (31021133112013).

The spelling of 20010121011011 in words is "twenty trillion, ten billion, one hundred twenty-one million, eleven thousand, eleven".