21110212000 has 96 divisors (see below), whose sum is σ = 52382335824. Its totient is φ = 8360320000.

The previous prime is 21110211973. The next prime is 21110212003. The reversal of 21110212000 is 21201112.

It can be written as a sum of positive squares in 8 ways, for example, as 2881971856 + 18228240144 = 53684^2 + 135012^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (21110212003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377874 + ... + 430126.

Almost surely, 2^21110212000 is an apocalyptic number.

21110212000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21110212000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26191167912).

21110212000 is an abundant number, since it is smaller than the sum of its proper divisors (31272123824).

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

21110212000 is a wasteful number, since it uses less digits than its factorization.

21110212000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52379 (or 52361 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21110212000 its reverse (21201112), we get a palindrome (21131413112).

The spelling of 21110212000 in words is "twenty-one billion, one hundred ten million, two hundred twelve thousand".