21110212001100 has 72 divisors (see below), whose sum is σ = 62729660631568. Its totient is φ = 5477244192000.

The previous prime is 21110212001059. The next prime is 21110212001101. The reversal of 21110212001100 is 110021201112.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (21110212001101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 950899351 + ... + 950921550.

Almost surely, 2^{21110212001100} is an apocalyptic number.

21110212001100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110212001100 is an abundant number, since it is smaller than the sum of its proper divisors (41619448630468).

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

21110212001100 is a wasteful number, since it uses less digits than its factorization.

21110212001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901820955 (or 1901820948 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21110212001100 its reverse (110021201112), we get a palindrome (21220233202212).

The spelling of 21110212001100 in words is "twenty-one trillion, one hundred ten billion, two hundred twelve million, one thousand, one hundred".