20110211123021 has 2 divisors, whose sum is σ = 20110211123022. Its totient is φ = 20110211123020.

The previous prime is 20110211122931. The next prime is 20110211123053. The reversal of 20110211123021 is 12032111201102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18562189924996 + 1548021198025 = 4308386^2 + 1244195^2 .

It is a cyclic number.

It is not a de Polignac number, because 20110211123021 - 2¹⁴ = 20110211106637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110211125021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055105561510 + 10055105561511.

It is an arithmetic number, because the mean of its divisors is an integer number (10055105561511).

Almost surely, 2^{20110211123021} is an apocalyptic number.

It is an amenable number.

20110211123021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110211123021 is an equidigital number, since it uses as much as digits as its factorization.

20110211123021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20110211123021 its reverse (12032111201102), we get a palindrome (32142322324123).

The spelling of 20110211123021 in words is "twenty trillion, one hundred ten billion, two hundred eleven million, one hundred twenty-three thousand, twenty-one".