210021122 has 16 divisors (see below), whose sum is σ = 318942360.
Its totient is φ = 103713792.
The previous prime is 210021121. The next prime is 210021143. The reversal of 210021122 is 221120012.
Adding to 210021122 its reverse (221120012), we get a palindrome (431141134).
It is a happy number.
It can be written as a sum of positive squares in 4 ways, for example, as 4414201 + 205606921 = 2101^2 + 14339^2
It is a super-2 number, since 2×2100211222 = 88217743372277768, which contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (210021121) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69254 + ... + 72222.
Almost surely, 2210021122 is an apocalyptic number.
210021122 is a deficient number, since it is larger than the sum of its proper divisors (108921238).
210021122 is a wasteful number, since it uses less digits than its factorization.
210021122 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3397.
The product of its (nonzero) digits is 16, while the sum is 11.
The square root of 210021122 is about 14492.1055061023.
The cubic root of 210021122 is about 594.4121227859.
The spelling of 210021122 in words is "two hundred ten million, twenty-one thousand, one hundred twenty-two".