1025511523321 has 4 divisors (see below), whose sum is σ = 1026675555444. Its totient is φ = 1024347491200.

The previous prime is 1025511523303. The next prime is 1025511523423. The reversal of 1025511523321 is 1233251155201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 306848415721 + 718663107600 = 553939^2 + 847740^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025511523321 - 2¹¹ = 1025511521273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025511823321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582014740 + ... + 582016501.

It is an arithmetic number, because the mean of its divisors is an integer number (256668888861).

Almost surely, 2^{1025511523321} is an apocalyptic number.

It is an amenable number.

1025511523321 is a deficient number, since it is larger than the sum of its proper divisors (1164032123).

1025511523321 is an equidigital number, since it uses as much as digits as its factorization.

1025511523321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164032122.

The product of its (nonzero) digits is 9000, while the sum is 31.

Adding to 1025511523321 its reverse (1233251155201), we get a palindrome (2258762678522).

It can be divided in two parts, 10255115 and 23321, that added together give a square (10278436 = 3206²).

The spelling of 1025511523321 in words is "one trillion, twenty-five billion, five hundred eleven million, five hundred twenty-three thousand, three hundred twenty-one".