21211111200112 has 80 divisors (see below), whose sum is σ = 45550291451904. Its totient is φ = 9523656576000.

The previous prime is 21211111200101. The next prime is 21211111200137. The reversal of 21211111200112 is 21100211111212.

It is a super-2 number, since 2×21211111200112² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17116464 + ... + 18313807.

Almost surely, 2^{21211111200112} is an apocalyptic number.

It is an amenable number.

21211111200112 is an abundant number, since it is smaller than the sum of its proper divisors (24339180251792).

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

21211111200112 is a wasteful number, since it uses less digits than its factorization.

21211111200112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35430398 (or 35430392 counting only the distinct ones).

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

Adding to 21211111200112 its reverse (21100211111212), we get a palindrome (42311322311324).

The spelling of 21211111200112 in words is "twenty-one trillion, two hundred eleven billion, one hundred eleven million, two hundred thousand, one hundred twelve".