2120021110001 has 2 divisors, whose sum is σ = 2120021110002. Its totient is φ = 2120021110000.

The previous prime is 2120021109967. The next prime is 2120021110021. The reversal of 2120021110001 is 1000111200212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1782227670001 + 337793440000 = 1335001^2 + 581200^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120021110001 - 2⁶ = 2120021109937 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120021110021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060010555000 + 1060010555001.

It is an arithmetic number, because the mean of its divisors is an integer number (1060010555001).

Almost surely, 2^{2120021110001} is an apocalyptic number.

It is an amenable number.

2120021110001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120021110001 is an equidigital number, since it uses as much as digits as its factorization.

2120021110001 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 2120021110001 its reverse (1000111200212), we get a palindrome (3120132310213).

The spelling of 2120021110001 in words is "two trillion, one hundred twenty billion, twenty-one million, one hundred ten thousand, one".