21022112100012 has 24 divisors (see below), whose sum is σ = 49335130135536. Its totient is φ = 6966865666368.

The previous prime is 21022112100007. The next prime is 21022112100023. The reversal of 21022112100012 is 21000121122012.

It is a junction number, because it is equal to n+sod(n) for n = 21022112099964 and 21022112100000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5063127043 + ... + 5063131194.

It is an arithmetic number, because the mean of its divisors is an integer number (2055630422314).

Almost surely, 2^{21022112100012} is an apocalyptic number.

It is an amenable number.

21022112100012 is an abundant number, since it is smaller than the sum of its proper divisors (28313018035524).

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

21022112100012 is a wasteful number, since it uses less digits than its factorization.

21022112100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10126258417 (or 10126258415 counting only the distinct ones).

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

Adding to 21022112100012 its reverse (21000121122012), we get a palindrome (42022233222024).

The spelling of 21022112100012 in words is "twenty-one trillion, twenty-two billion, one hundred twelve million, one hundred thousand, twelve".