10210001220 has 144 divisors (see below), whose sum is σ = 31792833072. Its totient is φ = 2650644480.

The previous prime is 10210001201. The next prime is 10210001237. The reversal of 10210001220 is 2210001201.

It can be written as a sum of positive squares in 8 ways, for example, as 1371369024 + 8838632196 = 37032^2 + 94014^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4375174 + ... + 4377506.

It is an arithmetic number, because the mean of its divisors is an integer number (220783563).

Almost surely, 2^10210001220 is an apocalyptic number.

10210001220 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 10210001220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15896416536).

10210001220 is an abundant number, since it is smaller than the sum of its proper divisors (21582831852).

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

10210001220 is a wasteful number, since it uses less digits than its factorization.

10210001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2982 (or 2977 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 10210001220 its reverse (2210001201), we get a palindrome (12420002421).

The spelling of 10210001220 in words is "ten billion, two hundred ten million, one thousand, two hundred twenty".