102023321220 has 144 divisors (see below), whose sum is σ = 319013280768. Its totient is φ = 26372770560.

The previous prime is 102023321201. The next prime is 102023321233. The reversal of 102023321220 is 22123320201.

102023321220 is a `hidden beast` number, since 10 + 202 + 332 + 122 + 0 = 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 = 102023321193 and 102023321202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1776597 + ... + 1833123.

Almost surely, 2^102023321220 is an apocalyptic number.

102023321220 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 102023321220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159506640384).

102023321220 is an abundant number, since it is smaller than the sum of its proper divisors (216989959548).

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

102023321220 is a wasteful number, since it uses less digits than its factorization.

102023321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56850 (or 56845 counting only the distinct ones).

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

Adding to 102023321220 its reverse (22123320201), we get a palindrome (124146641421).

The spelling of 102023321220 in words is "one hundred two billion, twenty-three million, three hundred twenty-one thousand, two hundred twenty".