220100021200 has 120 divisors (see below), whose sum is σ = 543697451136. Its totient is φ = 85574016000.

The previous prime is 220100021189. The next prime is 220100021221. The reversal of 220100021200 is 2120001022.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4419639 + ... + 4469161.

Almost surely, 2^220100021200 is an apocalyptic number.

220100021200 is a gapful number since it is divisible by the number (20) 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 220100021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271848725568).

220100021200 is an abundant number, since it is smaller than the sum of its proper divisors (323597429936).

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

220100021200 is a wasteful number, since it uses less digits than its factorization.

220100021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49853 (or 49842 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 220100021200 its reverse (2120001022), we get a palindrome (222220022222).

The spelling of 220100021200 in words is "two hundred twenty billion, one hundred million, twenty-one thousand, two hundred".