2124040121989 has 2 divisors, whose sum is σ = 2124040121990. Its totient is φ = 2124040121988.

The previous prime is 2124040121921. The next prime is 2124040122019. The reversal of 2124040121989 is 9891210404212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2069828916100 + 54211205889 = 1438690^2 + 232833^2 .

It is a cyclic number.

It is not a de Polignac number, because 2124040121989 - 2³⁵ = 2089680383621 is a prime.

It is a super-2 number, since 2×2124040121989² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2124040121089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062020060994 + 1062020060995.

It is an arithmetic number, because the mean of its divisors is an integer number (1062020060995).

Almost surely, 2^{2124040121989} is an apocalyptic number.

It is an amenable number.

2124040121989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2124040121989 is an equidigital number, since it uses as much as digits as its factorization.

2124040121989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 43.

The spelling of 2124040121989 in words is "two trillion, one hundred twenty-four billion, forty million, one hundred twenty-one thousand, nine hundred eighty-nine".