2121010121011 has 16 divisors (see below), whose sum is σ = 2218996448928. Its totient is φ = 2025411897600.

The previous prime is 2121010120993. The next prime is 2121010121039. The reversal of 2121010121011 is 1101210101212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2121010121011 - 2⁹ = 2121010120499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121010120982 and 2121010121000.

It is not an unprimeable number, because it can be changed into a prime (2121010121051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244401 + ... + 2074066.

It is an arithmetic number, because the mean of its divisors is an integer number (138687278058).

Almost surely, 2^{2121010121011} is an apocalyptic number.

2121010121011 is a deficient number, since it is larger than the sum of its proper divisors (97986327917).

2121010121011 is a wasteful number, since it uses less digits than its factorization.

2121010121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318982.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2121010121011 its reverse (1101210101212), we get a palindrome (3222220222223).

The spelling of 2121010121011 in words is "two trillion, one hundred twenty-one billion, ten million, one hundred twenty-one thousand, eleven".