2120121011 has 2 divisors, whose sum is σ = 2120121012. Its totient is φ = 2120121010.

The previous prime is 2120120971. The next prime is 2120121077. The reversal of 2120121011 is 1101210212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2120121011 - 2¹⁴ = 2120104627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120120983 and 2120121001.

It is not a weakly prime, because it can be changed into another prime (2120121811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060060505 + 1060060506.

It is an arithmetic number, because the mean of its divisors is an integer number (1060060506).

Almost surely, 2^2120121011 is an apocalyptic number.

2120121011 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120121011 is an equidigital number, since it uses as much as digits as its factorization.

2120121011 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.

The square root of 2120121011 is about 46044.7718096203. The cubic root of 2120121011 is about 1284.6560997885.

Adding to 2120121011 its reverse (1101210212), we get a palindrome (3221331223).

The spelling of 2120121011 in words is "two billion, one hundred twenty million, one hundred twenty-one thousand, eleven".