21221121000112 has 80 divisors (see below), whose sum is σ = 45301242034944. Its totient is φ = 9549740000000.

The previous prime is 21221121000091. The next prime is 21221121000139. The reversal of 21221121000112 is 21100012112212.

It is a super-2 number, since 2×21221121000112² (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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287703237 + ... + 287776987.

Almost surely, 2^{21221121000112} is an apocalyptic number.

21221121000112 is a gapful number since it is divisible by the number (22) 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 21221121000112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22650621017472).

21221121000112 is an abundant number, since it is smaller than the sum of its proper divisors (24080121034832).

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

21221121000112 is a wasteful number, since it uses less digits than its factorization.

21221121000112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90058 (or 90052 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21221121000112 its reverse (21100012112212), we get a palindrome (42321133112324).

The spelling of 21221121000112 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred twelve", and thus it is an aban number.