21022012110012 has 48 divisors (see below), whose sum is σ = 49392948552192. Its totient is φ = 6958620639040.

The previous prime is 21022012110007. The next prime is 21022012110013. The reversal of 21022012110012 is 21001121022012.

It is a junction number, because it is equal to n+sod(n) for n = 21022012109973 and 21022012110000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022012110013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3021183 + ... + 7153430.

It is an arithmetic number, because the mean of its divisors is an integer number (1029019761504).

Almost surely, 2^{21022012110012} is an apocalyptic number.

It is an amenable number.

21022012110012 is an abundant number, since it is smaller than the sum of its proper divisors (28370936442180).

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

21022012110012 is a wasteful number, since it uses less digits than its factorization.

21022012110012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10175818 (or 10175816 counting only the distinct ones).

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

Adding to 21022012110012 its reverse (21001121022012), we get a palindrome (42023133132024).

The spelling of 21022012110012 in words is "twenty-one trillion, twenty-two billion, twelve million, one hundred ten thousand, twelve".