102203120520 has 160 divisors (see below), whose sum is σ = 349339003200. Its totient is φ = 26792180352.

The previous prime is 102203120507. The next prime is 102203120521. The reversal of 102203120520 is 25021302201.

102203120520 is a `hidden beast` number, since 1 + 0 + 2 + 20 + 3 + 120 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 102203120493 and 102203120502.

It is not an unprimeable number, because it can be changed into a prime (102203120521) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 76164 + ... + 458483.

It is an arithmetic number, because the mean of its divisors is an integer number (2183368770).

Almost surely, 2^102203120520 is an apocalyptic number.

102203120520 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 102203120520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174669501600).

102203120520 is an abundant number, since it is smaller than the sum of its proper divisors (247135882680).

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

102203120520 is a wasteful number, since it uses less digits than its factorization.

102203120520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534729 (or 534716 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 102203120520 its reverse (25021302201), we get a palindrome (127224422721).

The spelling of 102203120520 in words is "one hundred two billion, two hundred three million, one hundred twenty thousand, five hundred twenty".