210021212122 has 8 divisors (see below), whose sum is σ = 316964529216. Its totient is φ = 104366369052.

The previous prime is 210021212083. The next prime is 210021212129. The reversal of 210021212122 is 221212120012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 210021212096 and 210021212105.

It is not an unprimeable number, because it can be changed into a prime (210021212129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322118098 + ... + 322118749.

It is an arithmetic number, because the mean of its divisors is an integer number (39620566152).

Almost surely, 2^210021212122 is an apocalyptic number.

210021212122 is a deficient number, since it is larger than the sum of its proper divisors (106943317094).

210021212122 is a wasteful number, since it uses less digits than its factorization.

210021212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644237012.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210021212122 its reverse (221212120012), we get a palindrome (431233332134).

The spelling of 210021212122 in words is "two hundred ten billion, twenty-one million, two hundred twelve thousand, one hundred twenty-two".