20211211221100 has 36 divisors (see below), whose sum is σ = 43883347742584. Its totient is φ = 8079872618880.

The previous prime is 20211211221013. The next prime is 20211211221139. The reversal of 20211211221100 is 112211211202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57472194 + ... + 57822793.

Almost surely, 2^{20211211221100} is an apocalyptic number.

20211211221100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20211211221100 is an abundant number, since it is smaller than the sum of its proper divisors (23672136521484).

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

20211211221100 is a wasteful number, since it uses less digits than its factorization.

20211211221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115296754 (or 115296747 counting only the distinct ones).

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

Adding to 20211211221100 its reverse (112211211202), we get a palindrome (20323422432302).

The spelling of 20211211221100 in words is "twenty trillion, two hundred eleven billion, two hundred eleven million, two hundred twenty-one thousand, one hundred".