21210001101112 has 32 divisors (see below), whose sum is σ = 40097238627600. Its totient is φ = 10517504774400.

The previous prime is 21210001101083. The next prime is 21210001101119. The reversal of 21210001101112 is 21110110001212.

It is a happy number.

It is a super-3 number, since 3×21210001101112³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21210001101092 and 21210001101101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210001101119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4602939 + ... + 7975402.

Almost surely, 2^{21210001101112} is an apocalyptic number.

It is an amenable number.

21210001101112 is a deficient number, since it is larger than the sum of its proper divisors (18887237526488).

21210001101112 is a wasteful number, since it uses less digits than its factorization.

21210001101112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12580087 (or 12580083 counting only the distinct ones).

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

Adding to 21210001101112 its reverse (21110110001212), we get a palindrome (42320111102324).

The spelling of 21210001101112 in words is "twenty-one trillion, two hundred ten billion, one million, one hundred one thousand, one hundred twelve".