210121200201220 has 96 divisors (see below), whose sum is σ = 550428606524160. Its totient is φ = 65457429219840.

The previous prime is 210121200201197. The next prime is 210121200201247. The reversal of 210121200201220 is 22102002121012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 210121200201194 and 210121200201203.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33455275 + ... + 39236434.

It is an arithmetic number, because the mean of its divisors is an integer number (5733631317960).

Almost surely, 2^{210121200201220} is an apocalyptic number.

210121200201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210121200201220 is an abundant number, since it is smaller than the sum of its proper divisors (340307406322940).

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

210121200201220 is a wasteful number, since it uses less digits than its factorization.

210121200201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72693613 (or 72693611 counting only the distinct ones).

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

Adding to 210121200201220 its reverse (22102002121012), we get a palindrome (232223202322232).

The spelling of 210121200201220 in words is "two hundred ten trillion, one hundred twenty-one billion, two hundred million, two hundred one thousand, two hundred twenty".