102001010220 has 144 divisors (see below), whose sum is σ = 324527269248. Its totient is φ = 25901959680.

The previous prime is 102001010203. The next prime is 102001010227. The reversal of 102001010220 is 22010100201.

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

It is not an unprimeable number, because it can be changed into a prime (102001010227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 150090 + ... + 475950.

It is an arithmetic number, because the mean of its divisors is an integer number (2253661592).

Almost surely, 2^102001010220 is an apocalyptic number.

102001010220 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 102001010220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162263634624).

102001010220 is an abundant number, since it is smaller than the sum of its proper divisors (222526259028).

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

102001010220 is a wasteful number, since it uses less digits than its factorization.

102001010220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325960 (or 325955 counting only the distinct ones).

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

Adding to 102001010220 its reverse (22010100201), we get a palindrome (124011110421).

The spelling of 102001010220 in words is "one hundred two billion, one million, ten thousand, two hundred twenty".