21121101120012 has 12 divisors (see below), whose sum is σ = 49282569280056. Its totient is φ = 7040367040000.

The previous prime is 21121101119959. The next prime is 21121101120059. The reversal of 21121101120012 is 21002110112112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×21121101120012² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121101119973 and 21121101120000.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 880045879989 + ... + 880045880012.

It is an arithmetic number, because the mean of its divisors is an integer number (4106880773338).

Almost surely, 2^{21121101120012} is an apocalyptic number.

It is an amenable number.

21121101120012 is an abundant number, since it is smaller than the sum of its proper divisors (28161468160044).

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

21121101120012 is a wasteful number, since it uses less digits than its factorization.

21121101120012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760091760008 (or 1760091760006 counting only the distinct ones).

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

Adding to 21121101120012 its reverse (21002110112112), we get a palindrome (42123211232124).

The spelling of 21121101120012 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred one million, one hundred twenty thousand, twelve".