21000101121112 has 32 divisors (see below), whose sum is σ = 39758598341280. Its totient is φ = 10397814001920.

The previous prime is 21000101121071. The next prime is 21000101121149. The reversal of 21000101121112 is 21112110100012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21000101121092 and 21000101121101.

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, 30354412 + ... + 31038532.

It is an arithmetic number, because the mean of its divisors is an integer number (1242456198165).

Almost surely, 2^{21000101121112} is an apocalyptic number.

It is an amenable number.

21000101121112 is a deficient number, since it is larger than the sum of its proper divisors (18758497220168).

21000101121112 is a wasteful number, since it uses less digits than its factorization.

21000101121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721483 (or 721479 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21000101121112 its reverse (21112110100012), we get a palindrome (42112211221124).

The spelling of 21000101121112 in words is "twenty-one trillion, one hundred one million, one hundred twenty-one thousand, one hundred twelve".