10202001220 has 24 divisors (see below), whose sum is σ = 21428800344. Its totient is φ = 4079924736.

The previous prime is 10202001179. The next prime is 10202001239. The reversal of 10202001220 is 2210020201.

It can be written as a sum of positive squares in 4 ways, for example, as 370485504 + 9831515716 = 19248^2 + 99154^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 10202001197 and 10202001206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45244 + ... + 149836.

It is an arithmetic number, because the mean of its divisors is an integer number (892866681).

Almost surely, 2^10202001220 is an apocalyptic number.

10202001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10202001220 is an abundant number, since it is smaller than the sum of its proper divisors (11226799124).

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

10202001220 is a wasteful number, since it uses less digits than its factorization.

10202001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109479 (or 109477 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 10202001220 its reverse (2210020201), we get a palindrome (12412021421).

The spelling of 10202001220 in words is "ten billion, two hundred two million, one thousand, two hundred twenty".