21110221201100 has 36 divisors (see below), whose sum is σ = 46262736266208. Its totient is φ = 8360483640000.

The previous prime is 21110221201081. The next prime is 21110221201109. The reversal of 21110221201100 is 110212201112.

It is not an unprimeable number, because it can be changed into a prime (21110221201109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1045050356 + ... + 1045070555.

Almost surely, 2^{21110221201100} is an apocalyptic number.

21110221201100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110221201100 is an abundant number, since it is smaller than the sum of its proper divisors (25152515065108).

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

21110221201100 is a wasteful number, since it uses less digits than its factorization.

21110221201100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090121026 (or 2090121019 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21110221201100 its reverse (110212201112), we get a palindrome (21220433402212).

The spelling of 21110221201100 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty-one million, two hundred one thousand, one hundred".