211102210120020 has 96 divisors (see below), whose sum is σ = 616949598101760. Its totient is φ = 53832042485760.

The previous prime is 211102210120001. The next prime is 211102210120031. The reversal of 211102210120020 is 20021012201112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15146515 + ... + 25526874.

It is an arithmetic number, because the mean of its divisors is an integer number (6426558313560).

Almost surely, 2^{211102210120020} is an apocalyptic number.

211102210120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211102210120020 is an abundant number, since it is smaller than the sum of its proper divisors (405847387981740).

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

211102210120020 is a wasteful number, since it uses less digits than its factorization.

211102210120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40677185 (or 40677183 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211102210120020 its reverse (20021012201112), we get a palindrome (231123222321132).

The spelling of 211102210120020 in words is "two hundred eleven trillion, one hundred two billion, two hundred ten million, one hundred twenty thousand, twenty".