1020351312525 has 48 divisors (see below), whose sum is σ = 1703796825024. Its totient is φ = 538769134080.

The previous prime is 1020351312523. The next prime is 1020351312553. The reversal of 1020351312525 is 5252131530201.

It is not a de Polignac number, because 1020351312525 - 2¹ = 1020351312523 is a prime.

It is a super-2 number, since 2×1020351312525² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1020351312492 and 1020351312501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020351312523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13259059 + ... + 13335791.

It is an arithmetic number, because the mean of its divisors is an integer number (35495767188).

Almost surely, 2^{1020351312525} is an apocalyptic number.

1020351312525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1020351312525 is a deficient number, since it is larger than the sum of its proper divisors (683445512499).

1020351312525 is a wasteful number, since it uses less digits than its factorization.

1020351312525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78510 (or 78505 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 1020351312525 its reverse (5252131530201), we get a palindrome (6272482842726).

The spelling of 1020351312525 in words is "one trillion, twenty billion, three hundred fifty-one million, three hundred twelve thousand, five hundred twenty-five".