21220121000112 has 80 divisors (see below), whose sum is σ = 56559684531840. Its totient is φ = 6851205849600.

The previous prime is 21220121000093. The next prime is 21220121000159. The reversal of 21220121000112 is 21100012102212.

It is a junction number, because it is equal to n+sod(n) for n = 21220121000091 and 21220121000100.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38512714 + ... + 39059817.

It is an arithmetic number, because the mean of its divisors is an integer number (706996056648).

Almost surely, 2^{21220121000112} is an apocalyptic number.

It is an amenable number.

21220121000112 is an abundant number, since it is smaller than the sum of its proper divisors (35339563531728).

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

21220121000112 is a wasteful number, since it uses less digits than its factorization.

21220121000112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77572722 (or 77572716 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21220121000112 its reverse (21100012102212), we get a palindrome (42320133102324).

The spelling of 21220121000112 in words is "twenty-one trillion, two hundred twenty billion, one hundred twenty-one million, one hundred twelve", and thus it is an aban number.