20211100212 has 24 divisors (see below), whose sum is σ = 47226527712. Its totient is φ = 6727420000.

The previous prime is 20211100207. The next prime is 20211100243. The reversal of 20211100212 is 21200111202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1192914 + ... + 1209737.

It is an arithmetic number, because the mean of its divisors is an integer number (1967771988).

Almost surely, 2^20211100212 is an apocalyptic number.

It is an amenable number.

20211100212 is an abundant number, since it is smaller than the sum of its proper divisors (27015427500).

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

20211100212 is a wasteful number, since it uses less digits than its factorization.

20211100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403359 (or 2403357 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20211100212 its reverse (21200111202), we get a palindrome (41411211414).

The spelling of 20211100212 in words is "twenty billion, two hundred eleven million, one hundred thousand, two hundred twelve".