2101222 has 4 divisors (see below), whose sum is σ = 3151836. Its totient is φ = 1050610.

The previous prime is 2101219. The next prime is 2101223. The reversal of 2101222 is 2221012.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 2101199 and 2101208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525304 + ... + 525307.

It is an arithmetic number, because the mean of its divisors is an integer number (787959).

2^2101222 is an apocalyptic number.

2101222 is a deficient number, since it is larger than the sum of its proper divisors (1050614).

2101222 is a wasteful number, since it uses less digits than its factorization.

2101222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050613.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2101222 is about 1449.5592433564. The cubic root of 2101222 is about 128.0827508528.

Adding to 2101222 its reverse (2221012), we get a palindrome (4322234).

It can be divided in two parts, 21012 and 22, that multiplied together give a palindrome (462264).

The spelling of 2101222 in words is "two million, one hundred one thousand, two hundred twenty-two".