211100202221020 has 48 divisors (see below), whose sum is σ = 506649932587008. Its totient is φ = 72375862582080.

The previous prime is 211100202220979. The next prime is 211100202221033. The reversal of 211100202221020 is 20122202001112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 211100202220985 and 211100202221003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6509212 + ... + 21553891.

It is an arithmetic number, because the mean of its divisors is an integer number (10555206928896).

Almost surely, 2^{211100202221020} is an apocalyptic number.

211100202221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211100202221020 is an abundant number, since it is smaller than the sum of its proper divisors (295549730365988).

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

211100202221020 is a wasteful number, since it uses less digits than its factorization.

211100202221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28116850 (or 28116848 counting only the distinct ones).

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

Adding to 211100202221020 its reverse (20122202001112), we get a palindrome (231222404222132).

The spelling of 211100202221020 in words is "two hundred eleven trillion, one hundred billion, two hundred two million, two hundred twenty-one thousand, twenty".