21020112102222 has 96 divisors (see below), whose sum is σ = 46499036126400. Its totient is φ = 6861479694336.

The previous prime is 21020112102167. The next prime is 21020112102289. The reversal of 21020112102222 is 22220121102012.

It is a happy number.

21020112102222 is a `hidden beast` number, since 210 + 20 + 1 + 1 + 210 + 2 + 222 = 666.

It is a super-2 number, since 2×21020112102222² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21020112102195 and 21020112102204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 102759598 + ... + 102963950.

It is an arithmetic number, because the mean of its divisors is an integer number (484364959650).

Almost surely, 2^{21020112102222} is an apocalyptic number.

21020112102222 is an abundant number, since it is smaller than the sum of its proper divisors (25478924024178).

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

21020112102222 is a wasteful number, since it uses less digits than its factorization.

21020112102222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205082 (or 205079 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21020112102222 its reverse (22220121102012), we get a palindrome (43240233204234).

The spelling of 21020112102222 in words is "twenty-one trillion, twenty billion, one hundred twelve million, one hundred two thousand, two hundred twenty-two".