210200012121220 has 72 divisors (see below), whose sum is σ = 487210485878424. Its totient is φ = 76119204480000.

The previous prime is 210200012121191. The next prime is 210200012121221. The reversal of 210200012121220 is 22121210002012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 34267536407104 + 175932475714116 = 5853848^2 + 13263954^2 .

It is a super-2 number, since 2×210200012121220² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210200012121194 and 210200012121203.

It is not an unprimeable number, because it can be changed into a prime (210200012121221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 179623231 + ... + 180789670.

It is an arithmetic number, because the mean of its divisors is an integer number (6766812303867).

Almost surely, 2^{210200012121220} is an apocalyptic number.

210200012121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210200012121220 is an abundant number, since it is smaller than the sum of its proper divisors (277010473757204).

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

210200012121220 is a wasteful number, since it uses less digits than its factorization.

210200012121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360413173 (or 360413160 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210200012121220 its reverse (22121210002012), we get a palindrome (232321222123232).

The spelling of 210200012121220 in words is "two hundred ten trillion, two hundred billion, twelve million, one hundred twenty-one thousand, two hundred twenty".