210202120021122 has 128 divisors (see below), whose sum is σ = 489511388620800. Its totient is φ = 66734703465408.

The previous prime is 210202120021093. The next prime is 210202120021141. The reversal of 210202120021122 is 221120021202012.

It is a happy number.

210202120021122 is a `hidden beast` number, since 210 + 2 + 0 + 21 + 200 + 211 + 22 = 666.

It is a super-2 number, since 2×210202120021122² (a number of 29 digits) contains 22 as substring.

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 = 210202120021095 and 210202120021104.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 283231413 + ... + 283972599.

It is an arithmetic number, because the mean of its divisors is an integer number (3824307723600).

Almost surely, 2^{210202120021122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210202120021122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244755694310400).

210202120021122 is an abundant number, since it is smaller than the sum of its proper divisors (279309268599678).

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

210202120021122 is a wasteful number, since it uses less digits than its factorization.

210202120021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742197 (or 742191 counting only the distinct ones).

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

Adding to 210202120021122 its reverse (221120021202012), we get a palindrome (431322141223134).

The spelling of 210202120021122 in words is "two hundred ten trillion, two hundred two billion, one hundred twenty million, twenty-one thousand, one hundred twenty-two".