210121023220 has 48 divisors (see below), whose sum is σ = 443161635840. Its totient is φ = 83685822336.

The previous prime is 210121023187. The next prime is 210121023221. The reversal of 210121023220 is 22320121012.

It is a happy number.

210121023220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 210121023194 and 210121023203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121023221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4594989 + ... + 4640491.

It is an arithmetic number, because the mean of its divisors is an integer number (9232534080).

Almost surely, 2^210121023220 is an apocalyptic number.

210121023220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210121023220 is an abundant number, since it is smaller than the sum of its proper divisors (233040612620).

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

210121023220 is a wasteful number, since it uses less digits than its factorization.

210121023220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46504 (or 46502 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 210121023220 its reverse (22320121012), we get a palindrome (232441144232).

The spelling of 210121023220 in words is "two hundred ten billion, one hundred twenty-one million, twenty-three thousand, two hundred twenty".