21102210112 has 28 divisors (see below), whose sum is σ = 41958012096. Its totient is φ = 10530112640.

The previous prime is 21102210067. The next prime is 21102210113. The reversal of 21102210112 is 21101220112.

It is a super-2 number, since 2×21102210112² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21102210092 and 21102210101.

It is not an unprimeable number, because it can be changed into a prime (21102210113) 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, 295564 + ... + 359947.

It is an arithmetic number, because the mean of its divisors is an integer number (1498500432).

Almost surely, 2^21102210112 is an apocalyptic number.

It is an amenable number.

21102210112 is a deficient number, since it is larger than the sum of its proper divisors (20855801984).

21102210112 is an equidigital number, since it uses as much as digits as its factorization.

21102210112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656026 (or 656016 counting only the distinct ones).

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

Adding to 21102210112 its reverse (21101220112), we get a palindrome (42203430224).

The spelling of 21102210112 in words is "twenty-one billion, one hundred two million, two hundred ten thousand, one hundred twelve".