210121210210 has 16 divisors (see below), whose sum is σ = 378332193600. Its totient is φ = 84023147376.

The previous prime is 210121210151. The next prime is 210121210223. The reversal of 210121210210 is 12012121012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3132240 + ... + 3198619.

It is an arithmetic number, because the mean of its divisors is an integer number (23645762100).

Almost surely, 2^210121210210 is an apocalyptic number.

210121210210 is a deficient number, since it is larger than the sum of its proper divisors (168210983390).

210121210210 is a wasteful number, since it uses less digits than its factorization.

210121210210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6334185.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210121210210 its reverse (12012121012), we get a palindrome (222133331222).

The spelling of 210121210210 in words is "two hundred ten billion, one hundred twenty-one million, two hundred ten thousand, two hundred ten".