21111120112 has 10 divisors (see below), whose sum is σ = 40902795248. Its totient is φ = 10555560048.

The previous prime is 21111120071. The next prime is 21111120119. The reversal of 21111120112 is 21102111112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21111120092 and 21111120101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111120119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659722488 + ... + 659722519.

Almost surely, 2^21111120112 is an apocalyptic number.

It is an amenable number.

21111120112 is a deficient number, since it is larger than the sum of its proper divisors (19791675136).

21111120112 is a wasteful number, since it uses less digits than its factorization.

21111120112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319445015 (or 1319445009 counting only the distinct ones).

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

Adding to 21111120112 its reverse (21102111112), we get a palindrome (42213231224).

The spelling of 21111120112 in words is "twenty-one billion, one hundred eleven million, one hundred twenty thousand, one hundred twelve".