210221112012210 has 192 divisors, whose sum is σ = 609311107641600. Its totient is φ = 49929972632064.

The previous prime is 210221112012203. The next prime is 210221112012227. The reversal of 210221112012210 is 12210211122012.

210221112012210 is a `hidden beast` number, since 2 + 10 + 221 + 11 + 201 + 221 + 0 = 666.

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

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, 50346301 + ... + 54361679.

It is an arithmetic number, because the mean of its divisors is an integer number (3173495352300).

Almost surely, 2^{210221112012210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210221112012210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304655553820800).

210221112012210 is an abundant number, since it is smaller than the sum of its proper divisors (399089995629390).

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

210221112012210 is a wasteful number, since it uses less digits than its factorization.

210221112012210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4016977 (or 4016974 counting only the distinct ones).

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

Adding to 210221112012210 its reverse (12210211122012), we get a palindrome (222431323134222).

The spelling of 210221112012210 in words is "two hundred ten trillion, two hundred twenty-one billion, one hundred twelve million, twelve thousand, two hundred ten".