21120012011112 has 48 divisors (see below), whose sum is σ = 61420443096960. Its totient is φ = 6034289145696.

The previous prime is 21120012010991. The next prime is 21120012011129. The reversal of 21120012011112 is 21111021002112.

It is a happy number.

It is a super-2 number, since 2×21120012011112² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21120012011091 and 21120012011100.

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 11 ways as a sum of consecutive naturals, for example, 8979595768 + ... + 8979598119.

It is an arithmetic number, because the mean of its divisors is an integer number (1279592564520).

Almost surely, 2^{21120012011112} is an apocalyptic number.

It is an amenable number.

21120012011112 is an abundant number, since it is smaller than the sum of its proper divisors (40300431085848).

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

21120012011112 is a wasteful number, since it uses less digits than its factorization.

21120012011112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17959193910 (or 17959193899 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21120012011112 its reverse (21111021002112), we get a palindrome (42231033013224).

The spelling of 21120012011112 in words is "twenty-one trillion, one hundred twenty billion, twelve million, eleven thousand, one hundred twelve".