210121210222200 has 144 divisors (see below), whose sum is σ = 707106055091280. Its totient is φ = 55917266388480.

The previous prime is 210121210222177. The next prime is 210121210222229. The reversal of 210121210222200 is 2222012121012.

It is a happy number.

210121210222200 is a `hidden beast` number, since 2 + 10 + 1 + 21 + 210 + 222 + 200 = 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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 118973509 + ... + 120726708.

Almost surely, 2^{210121210222200} is an apocalyptic number.

210121210222200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210121210222200 is an abundant number, since it is smaller than the sum of its proper divisors (496984844869080).

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

210121210222200 is a wasteful number, since it uses less digits than its factorization.

210121210222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239700726 (or 239700714 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 210121210222200 its reverse (2222012121012), we get a palindrome (212343222343212).

The spelling of 210121210222200 in words is "two hundred ten trillion, one hundred twenty-one billion, two hundred ten million, two hundred twenty-two thousand, two hundred".