2102222222021 has 8 divisors (see below), whose sum is σ = 2211572181600. Its totient is φ = 1995329565040.

The previous prime is 2102222222011. The next prime is 2102222222029. The reversal of 2102222222021 is 1202222222012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2102222222021 - 2¹⁴ = 2102222205637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102222221984 and 2102222222002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102222222029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 614323895 + ... + 614327316.

It is an arithmetic number, because the mean of its divisors is an integer number (276446522700).

Almost surely, 2^{2102222222021} is an apocalyptic number.

It is an amenable number.

2102222222021 is a deficient number, since it is larger than the sum of its proper divisors (109349959579).

2102222222021 is a wasteful number, since it uses less digits than its factorization.

2102222222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228651299.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 2102222222021 its reverse (1202222222012), we get a palindrome (3304444444033).

Subtracting from 2102222222021 its reverse (1202222222012), we obtain a palindrome (900000000009).

The spelling of 2102222222021 in words is "two trillion, one hundred two billion, two hundred twenty-two million, two hundred twenty-two thousand, twenty-one".