202113121021110 has 448 divisors, whose sum is σ = 593763180373440. Its totient is φ = 49214073830400.

The previous prime is 202113121021109. The next prime is 202113121021129. The reversal of 202113121021110 is 11120121311202.

It is a happy number.

202113121021110 is a `hidden beast` number, since 2 + 0 + 211 + 31 + 210 + 211 + 1 + 0 = 666.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 11361682096 + ... + 11361699884.

It is an arithmetic number, because the mean of its divisors is an integer number (1325364241905).

Almost surely, 2^{202113121021110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202113121021110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296881590186720).

202113121021110 is an abundant number, since it is smaller than the sum of its proper divisors (391650059352330).

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

202113121021110 is a wasteful number, since it uses less digits than its factorization.

202113121021110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19115 (or 19100 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 202113121021110 its reverse (11120121311202), we get a palindrome (213233242332312).

The spelling of 202113121021110 in words is "two hundred two trillion, one hundred thirteen billion, one hundred twenty-one million, twenty-one thousand, one hundred ten".