210221122 has 4 divisors (see below), whose sum is σ = 315331686. Its totient is φ = 105110560.

The previous prime is 210221119. The next prime is 210221153. The reversal of 210221122 is 221122012.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 210221001 + 121 = 14499^2 + 11^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52555279 + ... + 52555282.

Almost surely, 2^210221122 is an apocalyptic number.

210221122 is a deficient number, since it is larger than the sum of its proper divisors (105110564).

210221122 is a wasteful number, since it uses less digits than its factorization.

210221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105110563.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 210221122 is about 14499.0041727010. The cubic root of 210221122 is about 594.6007462074.

Adding to 210221122 its reverse (221122012), we get a palindrome (431343134).

The spelling of 210221122 in words is "two hundred ten million, two hundred twenty-one thousand, one hundred twenty-two".