1021152440125 has 16 divisors (see below), whose sum is σ = 1274549273712. Its totient is φ = 816825139200.

The previous prime is 1021152440123. The next prime is 1021152440179. The reversal of 1021152440125 is 5210442511201.

It can be written as a sum of positive squares in 8 ways, for example, as 38558035044 + 982594405081 = 196362^2 + 991259^2 .

It is not a de Polignac number, because 1021152440125 - 2¹ = 1021152440123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021152440093 and 1021152440102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021152440123) 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, 584317 + ... + 1543933.

It is an arithmetic number, because the mean of its divisors is an integer number (79659329607).

Almost surely, 2^{1021152440125} is an apocalyptic number.

It is an amenable number.

1021152440125 is a deficient number, since it is larger than the sum of its proper divisors (253396833587).

1021152440125 is an frugal number, since it uses more digits than its factorization.

1021152440125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968145 (or 968135 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

Adding to 1021152440125 its reverse (5210442511201), we get a palindrome (6231594951326).

The spelling of 1021152440125 in words is "one trillion, twenty-one billion, one hundred fifty-two million, four hundred forty thousand, one hundred twenty-five".