102320231220 has 144 divisors (see below), whose sum is σ = 320563676160. Its totient is φ = 26390361600.

The previous prime is 102320231197. The next prime is 102320231231. The reversal of 102320231220 is 22132023201.

102320231220 is a `hidden beast` number, since 10 + 2 + 320 + 2 + 312 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 102320231193 and 102320231202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12723961 + ... + 12731999.

It is an arithmetic number, because the mean of its divisors is an integer number (2226136640).

Almost surely, 2^102320231220 is an apocalyptic number.

102320231220 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 102320231220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160281838080).

102320231220 is an abundant number, since it is smaller than the sum of its proper divisors (218243444940).

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

102320231220 is a wasteful number, since it uses less digits than its factorization.

102320231220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10366 (or 10361 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 102320231220 its reverse (22132023201), we get a palindrome (124452254421).

The spelling of 102320231220 in words is "one hundred two billion, three hundred twenty million, two hundred thirty-one thousand, two hundred twenty".