2125461154561 has 2 divisors, whose sum is σ = 2125461154562. Its totient is φ = 2125461154560.

The previous prime is 2125461154559. The next prime is 2125461154603. The reversal of 2125461154561 is 1654511645212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2107650650625 + 17810503936 = 1451775^2 + 133456^2 .

It is a cyclic number.

It is not a de Polignac number, because 2125461154561 - 2¹ = 2125461154559 is a prime.

It is a super-2 number, since 2×2125461154561² (a number of 25 digits) contains 22 as substring.

Together with 2125461154559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2125461154541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062730577280 + 1062730577281.

It is an arithmetic number, because the mean of its divisors is an integer number (1062730577281).

Almost surely, 2^{2125461154561} is an apocalyptic number.

It is an amenable number.

2125461154561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125461154561 is an equidigital number, since it uses as much as digits as its factorization.

2125461154561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288000, while the sum is 43.

Adding to 2125461154561 its reverse (1654511645212), we get a palindrome (3779972799773).

The spelling of 2125461154561 in words is "two trillion, one hundred twenty-five billion, four hundred sixty-one million, one hundred fifty-four thousand, five hundred sixty-one".