2011021112021 has 2 divisors, whose sum is σ = 2011021112022. Its totient is φ = 2011021112020.

The previous prime is 2011021112011. The next prime is 2011021112041. The reversal of 2011021112021 is 1202111201102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1144288041796 + 866733070225 = 1069714^2 + 930985^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011021112021 - 2³⁸ = 1736143205077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011021111987 and 2011021112005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011021112011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005510556010 + 1005510556011.

It is an arithmetic number, because the mean of its divisors is an integer number (1005510556011).

Almost surely, 2^{2011021112021} is an apocalyptic number.

It is an amenable number.

2011021112021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011021112021 is an equidigital number, since it uses as much as digits as its factorization.

2011021112021 is an evil number, because the sum of its binary digits is even.

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

Adding to 2011021112021 its reverse (1202111201102), we get a palindrome (3213132313123).

The spelling of 2011021112021 in words is "two trillion, eleven billion, twenty-one million, one hundred twelve thousand, twenty-one".