2011120121021 has 16 divisors (see below), whose sum is σ = 2197400928768. Its totient is φ = 1825416222000.

The previous prime is 2011120120969. The next prime is 2011120121089. The reversal of 2011120121021 is 1201210211102.

It is a cyclic number.

It is not a de Polignac number, because 2011120121021 - 2¹⁰ = 2011120119997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011120120987 and 2011120121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011120121321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25896776 + ... + 25974318.

It is an arithmetic number, because the mean of its divisors is an integer number (137337558048).

Almost surely, 2^{2011120121021} is an apocalyptic number.

It is an amenable number.

2011120121021 is a deficient number, since it is larger than the sum of its proper divisors (186280807747).

2011120121021 is a wasteful number, since it uses less digits than its factorization.

2011120121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81232.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2011120121021 its reverse (1201210211102), we get a palindrome (3212330332123).

The spelling of 2011120121021 in words is "two trillion, eleven billion, one hundred twenty million, one hundred twenty-one thousand, twenty-one".