21211000022000 has 40 divisors (see below), whose sum is σ = 51288198058032. Its totient is φ = 8484400008000.

The previous prime is 21211000021987. The next prime is 21211000022011. The reversal of 21211000022000 is 22000011212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5302748006 + ... + 5302752005.

Almost surely, 2^{21211000022000} is an apocalyptic number.

21211000022000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21211000022000 is an abundant number, since it is smaller than the sum of its proper divisors (30077198036032).

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

21211000022000 is a wasteful number, since it uses less digits than its factorization.

21211000022000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10605500034 (or 10605500018 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21211000022000 its reverse (22000011212), we get a palindrome (21233000033212).

The spelling of 21211000022000 in words is "twenty-one trillion, two hundred eleven billion, twenty-two thousand".