10021201220 has 12 divisors (see below), whose sum is σ = 21044522604. Its totient is φ = 4008480480.

The previous prime is 10021201163. The next prime is 10021201237. The reversal of 10021201220 is 2210212001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7054656064 + 2966545156 = 83992^2 + 54466^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250530011 + ... + 250530050.

It is an arithmetic number, because the mean of its divisors is an integer number (1753710217).

Almost surely, 2^10021201220 is an apocalyptic number.

10021201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10021201220 is an abundant number, since it is smaller than the sum of its proper divisors (11023321384).

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

10021201220 is a wasteful number, since it uses less digits than its factorization.

10021201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501060070 (or 501060068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 10021201220 its reverse (2210212001), we get a palindrome (12231413221).

The spelling of 10021201220 in words is "ten billion, twenty-one million, two hundred one thousand, two hundred twenty".