211202102120020 has 48 divisors (see below), whose sum is σ = 509310332395200. Its totient is φ = 72758618910720.

The previous prime is 211202102119997. The next prime is 211202102120041. The reversal of 211202102120020 is 20021201202112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 211202102119976 and 211202102120003.

It is a congruent number.

It is an unprimeable number.

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, 25263405165 + ... + 25263413524.

It is an arithmetic number, because the mean of its divisors is an integer number (10610631924900).

Almost surely, 2^{211202102120020} is an apocalyptic number.

211202102120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211202102120020 is an abundant number, since it is smaller than the sum of its proper divisors (298108230275180).

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

211202102120020 is a wasteful number, since it uses less digits than its factorization.

211202102120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50526818728 (or 50526818726 counting only the distinct ones).

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

Adding to 211202102120020 its reverse (20021201202112), we get a palindrome (231223303322132).

The spelling of 211202102120020 in words is "two hundred eleven trillion, two hundred two billion, one hundred two million, one hundred twenty thousand, twenty".