2125554344981 has 2 divisors, whose sum is σ = 2125554344982. Its totient is φ = 2125554344980.

The previous prime is 2125554344929. The next prime is 2125554345043. The reversal of 2125554344981 is 1894434555212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1718089156081 + 407465188900 = 1310759^2 + 638330^2 .

It is a cyclic number.

It is not a de Polignac number, because 2125554344981 - 2¹⁸ = 2125554082837 is a prime.

It is a super-2 number, since 2×2125554344981² (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 (2125554364981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062777172490 + 1062777172491.

It is an arithmetic number, because the mean of its divisors is an integer number (1062777172491).

Almost surely, 2^{2125554344981} is an apocalyptic number.

It is an amenable number.

2125554344981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125554344981 is an equidigital number, since it uses as much as digits as its factorization.

2125554344981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912000, while the sum is 53.

The spelling of 2125554344981 in words is "two trillion, one hundred twenty-five billion, five hundred fifty-four million, three hundred forty-four thousand, nine hundred eighty-one".