102221212020 has 144 divisors (see below), whose sum is σ = 304446524928. Its totient is φ = 25607232000.

The previous prime is 102221212003. The next prime is 102221212031. The reversal of 102221212020 is 20212122201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1839645 + ... + 1894395.

Almost surely, 2^102221212020 is an apocalyptic number.

102221212020 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 102221212020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152223262464).

102221212020 is an abundant number, since it is smaller than the sum of its proper divisors (202225312908).

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

102221212020 is a wasteful number, since it uses less digits than its factorization.

102221212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54858 (or 54827 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 102221212020 its reverse (20212122201), we get a palindrome (122433334221).

It can be divided in two parts, 102 and 221212020, that added together give a palindrome (221212122).

The spelling of 102221212020 in words is "one hundred two billion, two hundred twenty-one million, two hundred twelve thousand, twenty".