210200021122122 has 64 divisors (see below), whose sum is σ = 489184099401600. Its totient is φ = 67650581469744.

The previous prime is 210200021122111. The next prime is 210200021122123. The reversal of 210200021122122 is 221221120002012.

It is a happy number.

210200021122122 is a `hidden beast` number, since 2 + 10 + 200 + 0 + 211 + 221 + 22 = 666.

210200021122122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 210200021122095 and 210200021122104.

It is not an unprimeable number, because it can be changed into a prime (210200021122123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 828437008 + ... + 828690699.

It is an arithmetic number, because the mean of its divisors is an integer number (7643501553150).

Almost surely, 2^{210200021122122} is an apocalyptic number.

210200021122122 is an abundant number, since it is smaller than the sum of its proper divisors (278984078279478).

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

210200021122122 is an equidigital number, since it uses as much as digits as its factorization.

210200021122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657127759 (or 1657127741 counting only the distinct ones).

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

Adding to 210200021122122 its reverse (221221120002012), we get a palindrome (431421141124134).

The spelling of 210200021122122 in words is "two hundred ten trillion, two hundred billion, twenty-one million, one hundred twenty-two thousand, one hundred twenty-two".