1025343121251 has 16 divisors (see below), whose sum is σ = 1413557163648. Its totient is φ = 660657211200.

The previous prime is 1025343121217. The next prime is 1025343121273. The reversal of 1025343121251 is 1521213435201.

It is a happy number.

It is not a de Polignac number, because 1025343121251 - 2¹⁹ = 1025342596963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1025343121211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38940685 + ... + 38967006.

It is an arithmetic number, because the mean of its divisors is an integer number (88347322728).

Almost surely, 2^{1025343121251} is an apocalyptic number.

1025343121251 is a deficient number, since it is larger than the sum of its proper divisors (388214042397).

1025343121251 is a wasteful number, since it uses less digits than its factorization.

1025343121251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77907842.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 1025343121251 its reverse (1521213435201), we get a palindrome (2546556556452).

The spelling of 1025343121251 in words is "one trillion, twenty-five billion, three hundred forty-three million, one hundred twenty-one thousand, two hundred fifty-one".