21112212211000 has 64 divisors (see below), whose sum is σ = 49423021858080. Its totient is φ = 8441389964800.

The previous prime is 21112212210953. The next prime is 21112212211007. The reversal of 21112212211000 is 11221221112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112212211007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1950442 + ... + 6784441.

Almost surely, 2^{21112212211000} is an apocalyptic number.

21112212211000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112212211000 is an abundant number, since it is smaller than the sum of its proper divisors (28310809647080).

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

21112212211000 is a wasteful number, since it uses less digits than its factorization.

21112212211000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8737321 (or 8737307 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21112212211000 its reverse (11221221112), we get a palindrome (21123433432112).

The spelling of 21112212211000 in words is "twenty-one trillion, one hundred twelve billion, two hundred twelve million, two hundred eleven thousand".