21012101021112 has 32 divisors (see below), whose sum is σ = 52537648481280. Its totient is φ = 7003047549920.

The previous prime is 21012101021071. The next prime is 21012101021143. The reversal of 21012101021112 is 21112010121012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21012101021091 and 21012101021100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61458714 + ... + 61799657.

It is an arithmetic number, because the mean of its divisors is an integer number (1641801515040).

Almost surely, 2^{21012101021112} is an apocalyptic number.

It is an amenable number.

21012101021112 is an abundant number, since it is smaller than the sum of its proper divisors (31525547460168).

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

21012101021112 is a wasteful number, since it uses less digits than its factorization.

21012101021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123265483 (or 123265479 counting only the distinct ones).

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

Adding to 21012101021112 its reverse (21112010121012), we get a palindrome (42124111142124).

The spelling of 21012101021112 in words is "twenty-one trillion, twelve billion, one hundred one million, twenty-one thousand, one hundred twelve".