102001012220 has 48 divisors (see below), whose sum is σ = 217474020288. Its totient is φ = 40178926080.

The previous prime is 102001012103. The next prime is 102001012301. The reversal of 102001012220 is 22210100201.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 890630 + ... + 998610.

It is an arithmetic number, because the mean of its divisors is an integer number (4530708756).

Almost surely, 2^102001012220 is an apocalyptic number.

102001012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102001012220 is an abundant number, since it is smaller than the sum of its proper divisors (115473008068).

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

102001012220 is a wasteful number, since it uses less digits than its factorization.

102001012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108710 (or 108708 counting only the distinct ones).

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

Adding to 102001012220 its reverse (22210100201), we get a palindrome (124211112421).

The spelling of 102001012220 in words is "one hundred two billion, one million, twelve thousand, two hundred twenty".