2121020411 has 2 divisors, whose sum is σ = 2121020412. Its totient is φ = 2121020410.

The previous prime is 2121020381. The next prime is 2121020423. The reversal of 2121020411 is 1140201212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121020411 - 2²⁶ = 2053911547 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121020431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060510205 + 1060510206.

It is an arithmetic number, because the mean of its divisors is an integer number (1060510206).

Almost surely, 2^2121020411 is an apocalyptic number.

2121020411 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121020411 is an equidigital number, since it uses as much as digits as its factorization.

2121020411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2121020411 is about 46054.5373551836. The cubic root of 2121020411 is about 1284.8377335010.

Adding to 2121020411 its reverse (1140201212), we get a palindrome (3261221623).

The spelling of 2121020411 in words is "two billion, one hundred twenty-one million, twenty thousand, four hundred eleven".