2220221212100 has 72 divisors (see below), whose sum is σ = 4976959120896. Its totient is φ = 858807360000.

The previous prime is 2220221212093. The next prime is 2220221212189. The reversal of 2220221212100 is 12121220222.

It is a happy 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, 3955985 + ... + 4482215.

Almost surely, 2^{2220221212100} is an apocalyptic number.

2220221212100 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 2220221212100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2488479560448).

2220221212100 is an abundant number, since it is smaller than the sum of its proper divisors (2756737908796).

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

2220221212100 is a wasteful number, since it uses less digits than its factorization.

2220221212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527637 (or 527630 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2220221212100 its reverse (12121220222), we get a palindrome (2232342432322).

The spelling of 2220221212100 in words is "two trillion, two hundred twenty billion, two hundred twenty-one million, two hundred twelve thousand, one hundred".