21221100000112 has 40 divisors (see below), whose sum is σ = 42919592970240. Its totient is φ = 10145421485760.

The previous prime is 21221100000083. The next prime is 21221100000229. The reversal of 21221100000112 is 21100000112212.

It is a junction number, because it is equal to n+sod(n) for n = 21221100000092 and 21221100000101.

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, 9811912 + ... + 11777767.

It is an arithmetic number, because the mean of its divisors is an integer number (1072989824256).

Almost surely, 2^{21221100000112} is an apocalyptic number.

It is an amenable number.

21221100000112 is an abundant number, since it is smaller than the sum of its proper divisors (21698492970128).

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

21221100000112 is a wasteful number, since it uses less digits than its factorization.

21221100000112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21592381 (or 21592375 counting only the distinct ones).

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

Adding to 21221100000112 its reverse (21100000112212), we get a palindrome (42321100112324).

It can be divided in two parts, 212 and 21100000112, that multiplied together give a palindrome (4473200023744).

The spelling of 21221100000112 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred million, one hundred twelve", and thus it is an aban number.