21100002021112 has 32 divisors (see below), whose sum is σ = 45417044736000. Its totient is φ = 9002307070944.

The previous prime is 21100002021107. The next prime is 21100002021149. The reversal of 21100002021112 is 21112020000112.

It is a junction number, because it is equal to n+sod(n) for n = 21100002021092 and 21100002021101.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 844798612 + ... + 844823587.

It is an arithmetic number, because the mean of its divisors is an integer number (1419282648000).

Almost surely, 2^{21100002021112} is an apocalyptic number.

It is an amenable number.

21100002021112 is an abundant number, since it is smaller than the sum of its proper divisors (24317042714888).

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

21100002021112 is a wasteful number, since it uses less digits than its factorization.

21100002021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689622435 (or 1689622431 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21100002021112 its reverse (21112020000112), we get a palindrome (42212022021224).

The spelling of 21100002021112 in words is "twenty-one trillion, one hundred billion, two million, twenty-one thousand, one hundred twelve".