210001222 has 4 divisors (see below), whose sum is σ = 315001836. Its totient is φ = 105000610.

The previous prime is 210001219. The next prime is 210001271. The reversal of 210001222 is 222100012.

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 = 210001199 and 210001208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52500304 + ... + 52500307.

It is an arithmetic number, because the mean of its divisors is an integer number (78750459).

Almost surely, 2^210001222 is an apocalyptic number.

210001222 is a deficient number, since it is larger than the sum of its proper divisors (105000614).

210001222 is a wasteful number, since it uses less digits than its factorization.

210001222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105000613.

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

The square root of 210001222 is about 14491.4189091338. The cubic root of 210001222 is about 594.3933482062.

Adding to 210001222 its reverse (222100012), we get a palindrome (432101234).

It can be divided in two parts, 2100012 and 22, that multiplied together give a palindrome (46200264).

The spelling of 210001222 in words is "two hundred ten million, one thousand, two hundred twenty-two".