212000021000 has 32 divisors (see below), whose sum is σ = 496080051480. Its totient is φ = 84800008000.

The previous prime is 212000020933. The next prime is 212000021027. The reversal of 212000021000 is 120000212.

It can be written as a sum of positive squares in 4 ways, for example, as 56841235396 + 155158785604 = 238414^2 + 393902^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

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, 105999011 + ... + 106001010.

Almost surely, 2^212000021000 is an apocalyptic number.

212000021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212000021000 is an abundant number, since it is smaller than the sum of its proper divisors (284080030480).

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

212000021000 is a wasteful number, since it uses less digits than its factorization.

212000021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212000042 (or 212000028 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 212000021000 its reverse (120000212), we get a palindrome (212120021212).

The spelling of 212000021000 in words is "two hundred twelve billion, twenty-one thousand".