2101222211020 has 48 divisors (see below), whose sum is σ = 4596803719200. Its totient is φ = 806091015680.

The previous prime is 2101222211009. The next prime is 2101222211029. The reversal of 2101222211020 is 201122221012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2101222210985 and 2101222211003.

It is not an unprimeable number, because it can be changed into a prime (2101222211029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21667435 + ... + 21764194.

It is an arithmetic number, because the mean of its divisors is an integer number (95766744150).

Almost surely, 2^{2101222211020} is an apocalyptic number.

2101222211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101222211020 is an abundant number, since it is smaller than the sum of its proper divisors (2495581508180).

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

2101222211020 is a wasteful number, since it uses less digits than its factorization.

2101222211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43431738 (or 43431736 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2101222211020 its reverse (201122221012), we get a palindrome (2302344432032).

The spelling of 2101222211020 in words is "two trillion, one hundred one billion, two hundred twenty-two million, two hundred eleven thousand, twenty".