210220100111220 has 96 divisors (see below), whose sum is σ = 594571957045248. Its totient is φ = 55491927368832.

The previous prime is 210220100111201. The next prime is 210220100111221. The reversal of 210220100111220 is 22111001022012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 210220100111220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210220100111221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8351817 + ... + 22140303.

It is an arithmetic number, because the mean of its divisors is an integer number (6193457885888).

Almost surely, 2^{210220100111220} is an apocalyptic number.

210220100111220 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 210220100111220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297285978522624).

210220100111220 is an abundant number, since it is smaller than the sum of its proper divisors (384351856934028).

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

210220100111220 is a wasteful number, since it uses less digits than its factorization.

210220100111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13791069 (or 13791067 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210220100111220 its reverse (22111001022012), we get a palindrome (232331101133232).

The spelling of 210220100111220 in words is "two hundred ten trillion, two hundred twenty billion, one hundred million, one hundred eleven thousand, two hundred twenty".