21211002001112 has 32 divisors (see below), whose sum is σ = 49584160523520. Its totient is φ = 8264026753440.

The previous prime is 21211002001009. The next prime is 21211002001117. The reversal of 21211002001112 is 21110020011212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211002001117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17216721788 + ... + 17216723019.

It is an arithmetic number, because the mean of its divisors is an integer number (1549505016360).

Almost surely, 2^{21211002001112} is an apocalyptic number.

21211002001112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21211002001112 is an abundant number, since it is smaller than the sum of its proper divisors (28373158522408).

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

21211002001112 is a wasteful number, since it uses less digits than its factorization.

21211002001112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34433444831 (or 34433444827 counting only the distinct ones).

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

Adding to 21211002001112 its reverse (21110020011212), we get a palindrome (42321022012324).

The spelling of 21211002001112 in words is "twenty-one trillion, two hundred eleven billion, two million, one thousand, one hundred twelve".