21220011112 has 16 divisors (see below), whose sum is σ = 39789367200. Its totient is φ = 10609513200.

The previous prime is 21220011107. The next prime is 21220011119. The reversal of 21220011112 is 21111002212.

It is a junction number, because it is equal to n+sod(n) for n = 21220011092 and 21220011101.

It is not an unprimeable number, because it can be changed into a prime (21220011119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175189 + ... + 270427.

It is an arithmetic number, because the mean of its divisors is an integer number (2486835450).

Almost surely, 2^21220011112 is an apocalyptic number.

It is an amenable number.

21220011112 is a deficient number, since it is larger than the sum of its proper divisors (18569356088).

21220011112 is a wasteful number, since it uses less digits than its factorization.

21220011112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123096 (or 123092 counting only the distinct ones).

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

Adding to 21220011112 its reverse (21111002212), we get a palindrome (42331013324).

The spelling of 21220011112 in words is "twenty-one billion, two hundred twenty million, eleven thousand, one hundred twelve".