2145123123025 has 6 divisors (see below), whose sum is σ = 2659952672582. Its totient is φ = 1716098498400.

The previous prime is 2145123123001. The next prime is 2145123123041. The reversal of 2145123123025 is 5203213215412.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 724526118481 + 1420597004544 = 851191^2 + 1191888^2 .

It is not a de Polignac number, because 2145123123025 - 2⁷ = 2145123122897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42902462436 + ... + 42902462485.

Almost surely, 2^{2145123123025} is an apocalyptic number.

2145123123025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2145123123025 is a deficient number, since it is larger than the sum of its proper divisors (514829549557).

2145123123025 is an equidigital number, since it uses as much as digits as its factorization.

2145123123025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85804924931 (or 85804924926 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 2145123123025 its reverse (5203213215412), we get a palindrome (7348336338437).

The spelling of 2145123123025 in words is "two trillion, one hundred forty-five billion, one hundred twenty-three million, one hundred twenty-three thousand, twenty-five".