2121000120011 has 2 divisors, whose sum is σ = 2121000120012. Its totient is φ = 2121000120010.

The previous prime is 2121000119989. The next prime is 2121000120013. The reversal of 2121000120011 is 1100210001212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121000120011 - 2¹⁴ = 2121000103627 is a prime.

Together with 2121000120013, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121000119974 and 2121000120001.

It is not a weakly prime, because it can be changed into another prime (2121000120013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060500060005 + 1060500060006.

It is an arithmetic number, because the mean of its divisors is an integer number (1060500060006).

Almost surely, 2^{2121000120011} is an apocalyptic number.

2121000120011 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121000120011 is an equidigital number, since it uses as much as digits as its factorization.

2121000120011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2121000120011 its reverse (1100210001212), we get a palindrome (3221210121223).

The spelling of 2121000120011 in words is "two trillion, one hundred twenty-one billion, one hundred twenty thousand, eleven".