102001011220 has 24 divisors (see below), whose sum is σ = 219183570144. Its totient is φ = 39851557536.

The previous prime is 102001011209. The next prime is 102001011289. The reversal of 102001011220 is 22110100201.

102001011220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 = 102001011197 and 102001011206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59302054 + ... + 59303773.

It is an arithmetic number, because the mean of its divisors is an integer number (9132648756).

Almost surely, 2^102001011220 is an apocalyptic number.

102001011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102001011220 is an abundant number, since it is smaller than the sum of its proper divisors (117182558924).

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

102001011220 is a wasteful number, since it uses less digits than its factorization.

102001011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118605879 (or 118605877 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 102001011220 its reverse (22110100201), we get a palindrome (124111111421).

The spelling of 102001011220 in words is "one hundred two billion, one million, eleven thousand, two hundred twenty".