210121022 has 4 divisors (see below), whose sum is σ = 315181536.
Its totient is φ = 105060510.
The previous prime is 210121001. The next prime is 210121063. The reversal of 210121022 is 220121012.
It is a happy number.
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 = 210120994 and 210121012.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52530254 + ... + 52530257.
It is an arithmetic number, because the mean of its divisors is an integer number (78795384).
Almost surely, 2210121022 is an apocalyptic number.
210121022 is a deficient number, since it is larger than the sum of its proper divisors (105060514).
210121022 is a wasteful number, since it uses less digits than its factorization.
210121022 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 105060513.
The product of its (nonzero) digits is 16, while the sum is 11.
The square root of 210121022 is about 14495.5518004662.
The cubic root of 210121022 is about 594.5063551464.
Adding to 210121022 its reverse (220121012), we get a palindrome (430242034).
The spelling of 210121022 in words is "two hundred ten million, one hundred twenty-one thousand, twenty-two".