210121212100212 has 288 divisors, whose sum is σ = 628433441475840. Its totient is φ = 57949996769280.

The previous prime is 210121212100201. The next prime is 210121212100253. The reversal of 210121212100212 is 212001212121012.

210121212100212 is a `hidden beast` number, since 21 + 0 + 121 + 212 + 100 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1922002512 + ... + 1922111832.

It is an arithmetic number, because the mean of its divisors is an integer number (2182060560680).

Almost surely, 2^{210121212100212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210121212100212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314216720737920).

210121212100212 is an abundant number, since it is smaller than the sum of its proper divisors (418312229375628).

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

210121212100212 is a wasteful number, since it uses less digits than its factorization.

210121212100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111463 (or 111458 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 210121212100212 its reverse (212001212121012), we get a palindrome (422122424221224).

The spelling of 210121212100212 in words is "two hundred ten trillion, one hundred twenty-one billion, two hundred twelve million, one hundred thousand, two hundred twelve".