1020201002520 has 256 divisors, whose sum is σ = 3530030284800. Its totient is φ = 231047147520.

The previous prime is 1020201002519. The next prime is 1020201002581. The reversal of 1020201002520 is 252001020201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1020201002520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 86298210 + ... + 86310030.

It is an arithmetic number, because the mean of its divisors is an integer number (13789180800).

Almost surely, 2^{1020201002520} is an apocalyptic number.

1020201002520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020201002520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1765015142400).

1020201002520 is an abundant number, since it is smaller than the sum of its proper divisors (2509829282280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020201002520 is a wasteful number, since it uses less digits than its factorization.

1020201002520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12778 (or 12774 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

Adding to 1020201002520 its reverse (252001020201), we get a palindrome (1272202022721).

The spelling of 1020201002520 in words is "one trillion, twenty billion, two hundred one million, two thousand, five hundred twenty".