2123555101 has 2 divisors, whose sum is σ = 2123555102. Its totient is φ = 2123555100.

The previous prime is 2123555089. The next prime is 2123555111. The reversal of 2123555101 is 1015553212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1757789476 + 365765625 = 41926^2 + 19125^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123555101 - 2⁷ = 2123554973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123555111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061777550 + 1061777551.

It is an arithmetic number, because the mean of its divisors is an integer number (1061777551).

Almost surely, 2^2123555101 is an apocalyptic number.

It is an amenable number.

2123555101 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123555101 is an equidigital number, since it uses as much as digits as its factorization.

2123555101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 2123555101 is about 46082.0474914039. The cubic root of 2123555101 is about 1285.3493377150.

The spelling of 2123555101 in words is "two billion, one hundred twenty-three million, five hundred fifty-five thousand, one hundred one".