211021212200020 has 48 divisors (see below), whose sum is σ = 462579301094400. Its totient is φ = 80767814434560.

The previous prime is 211021212200011. The next prime is 211021212200119. The reversal of 211021212200020 is 20002212120112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 211021212199967 and 211021212200003.

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, 1912061640 + ... + 1912171999.

It is an arithmetic number, because the mean of its divisors is an integer number (9637068772800).

Almost surely, 2^{211021212200020} is an apocalyptic number.

211021212200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211021212200020 is an abundant number, since it is smaller than the sum of its proper divisors (251558088894380).

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

211021212200020 is a wasteful number, since it uses less digits than its factorization.

211021212200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3824233768 (or 3824233766 counting only the distinct ones).

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

Adding to 211021212200020 its reverse (20002212120112), we get a palindrome (231023424320132).

The spelling of 211021212200020 in words is "two hundred eleven trillion, twenty-one billion, two hundred twelve million, two hundred thousand, twenty".