1020131515225 has 12 divisors (see below), whose sum is σ = 1274619289680. Its totient is φ = 809875398800.

The previous prime is 1020131515189. The next prime is 1020131515241. The reversal of 1020131515225 is 5225151310201.

It is a happy number.

It is not a de Polignac number, because 1020131515225 - 2¹⁹ = 1020130990937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020131515193 and 1020131515202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155741995 + ... + 155748544.

It is an arithmetic number, because the mean of its divisors is an integer number (106218274140).

Almost surely, 2^{1020131515225} is an apocalyptic number.

It is an amenable number.

1020131515225 is a deficient number, since it is larger than the sum of its proper divisors (254487774455).

1020131515225 is a wasteful number, since it uses less digits than its factorization.

1020131515225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311490680 (or 311490675 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 1020131515225 its reverse (5225151310201), we get a palindrome (6245282825426).

The spelling of 1020131515225 in words is "one trillion, twenty billion, one hundred thirty-one million, five hundred fifteen thousand, two hundred twenty-five".