21200101020112 has 40 divisors (see below), whose sum is σ = 47103296196096. Its totient is φ = 9054748154496.

The previous prime is 21200101020071. The next prime is 21200101020169. The reversal of 21200101020112 is 21102010100212.

It is a junction number, because it is equal to n+sod(n) for n = 21200101020092 and 21200101020101.

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, 322981888 + ... + 323047519.

Almost surely, 2^{21200101020112} is an apocalyptic number.

It is an amenable number.

21200101020112 is an abundant number, since it is smaller than the sum of its proper divisors (25903195175984).

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

21200101020112 is a wasteful number, since it uses less digits than its factorization.

21200101020112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646029715 (or 646029709 counting only the distinct ones).

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

Adding to 21200101020112 its reverse (21102010100212), we get a palindrome (42302111120324).

The spelling of 21200101020112 in words is "twenty-one trillion, two hundred billion, one hundred one million, twenty thousand, one hundred twelve".