21022011112 has 16 divisors (see below), whose sum is σ = 39419036100. Its totient is φ = 10510268160.

The previous prime is 21022011091. The next prime is 21022011119. The reversal of 21022011112 is 21111022012.

It can be written as a sum of positive squares in 2 ways, for example, as 16966104516 + 4055906596 = 130254^2 + 63686^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21022011092 and 21022011101.

It is not an unprimeable number, because it can be changed into a prime (21022011119) 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, 40162 + ... + 208942.

Almost surely, 2^21022011112 is an apocalyptic number.

It is an amenable number.

21022011112 is a deficient number, since it is larger than the sum of its proper divisors (18397024988).

21022011112 is a wasteful number, since it uses less digits than its factorization.

21022011112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184356 (or 184352 counting only the distinct ones).

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

Adding to 21022011112 its reverse (21111022012), we get a palindrome (42133033124).

The spelling of 21022011112 in words is "twenty-one billion, twenty-two million, eleven thousand, one hundred twelve".