2100012222220 has 96 divisors (see below), whose sum is σ = 4971562396416. Its totient is φ = 738496416000.

The previous prime is 2100012222181. The next prime is 2100012222271. The reversal of 2100012222220 is 222222100012.

It is a junction number, because it is equal to n+sod(n) for n = 2100012222194 and 2100012222203.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143494 + ... + 2054413.

It is an arithmetic number, because the mean of its divisors is an integer number (51787108296).

Almost surely, 2^{2100012222220} is an apocalyptic number.

2100012222220 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 2100012222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2485781198208).

2100012222220 is an abundant number, since it is smaller than the sum of its proper divisors (2871550174196).

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

2100012222220 is a wasteful number, since it uses less digits than its factorization.

2100012222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198071 (or 2198069 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 2100012222220 its reverse (222222100012), we get a palindrome (2322234322232).

It can be divided in two parts, 2100012 and 222220, that added together give a palindrome (2322232).

The spelling of 2100012222220 in words is "two trillion, one hundred billion, twelve million, two hundred twenty-two thousand, two hundred twenty".