210121110010210 has 128 divisors (see below), whose sum is σ = 447266497019904. Its totient is φ = 69549973159680.

The previous prime is 210121110010193. The next prime is 210121110010277. The reversal of 210121110010210 is 12010011121012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1970564917 + ... + 1970671543.

It is an arithmetic number, because the mean of its divisors is an integer number (3494269507968).

Almost surely, 2^{210121110010210} is an apocalyptic number.

210121110010210 is an abundant number, since it is smaller than the sum of its proper divisors (237145387009694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210121110010210 is a wasteful number, since it uses less digits than its factorization.

210121110010210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108848.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 210121110010210 its reverse (12010011121012), we get a palindrome (222131121131222).

The spelling of 210121110010210 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred ten million, ten thousand, two hundred ten".