21002112201100 has 36 divisors (see below), whose sum is σ = 45628903782000. Its totient is φ = 8390831920960.

The previous prime is 21002112201029. The next prime is 21002112201113. The reversal of 21002112201100 is 110221120012.

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, 125077675 + ... + 125245474.

It is an arithmetic number, because the mean of its divisors is an integer number (1267469549500).

Almost surely, 2^{21002112201100} is an apocalyptic number.

21002112201100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21002112201100 is an abundant number, since it is smaller than the sum of its proper divisors (24626791580900).

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

21002112201100 is a wasteful number, since it uses less digits than its factorization.

21002112201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250324002 (or 250323995 counting only the distinct ones).

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

Adding to 21002112201100 its reverse (110221120012), we get a palindrome (21112333321112).

The spelling of 21002112201100 in words is "twenty-one trillion, two billion, one hundred twelve million, two hundred one thousand, one hundred".