102001123220 has 48 divisors (see below), whose sum is σ = 215263319040. Its totient is φ = 40598535936.

The previous prime is 102001123171. The next prime is 102001123229. The reversal of 102001123220 is 22321100201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 102001123195 and 102001123204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102001123229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13237889 + ... + 13245591.

It is an arithmetic number, because the mean of its divisors is an integer number (4484652480).

Almost surely, 2^102001123220 is an apocalyptic number.

102001123220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102001123220 is an abundant number, since it is smaller than the sum of its proper divisors (113262195820).

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

102001123220 is a wasteful number, since it uses less digits than its factorization.

102001123220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10904 (or 10902 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 102001123220 its reverse (22321100201), we get a palindrome (124322223421).

The spelling of 102001123220 in words is "one hundred two billion, one million, one hundred twenty-three thousand, two hundred twenty".