20211221110000 has 50 divisors (see below), whose sum is σ = 48933387453632. Its totient is φ = 8084488440000.

The previous prime is 20211221109991. The next prime is 20211221110057. The reversal of 20211221110000 is 1112211202.

It is a tau number, because it is divible by the number of its divisors (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1010551056 + ... + 1010571055.

Almost surely, 2^{20211221110000} is an apocalyptic number.

20211221110000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211221110000 is an abundant number, since it is smaller than the sum of its proper divisors (28722166343632).

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

20211221110000 is an equidigital number, since it uses as much as digits as its factorization.

20211221110000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021122139 (or 2021122118 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20211221110000 its reverse (1112211202), we get a palindrome (20212333321202).

The spelling of 20211221110000 in words is "twenty trillion, two hundred eleven billion, two hundred twenty-one million, one hundred ten thousand".