21033102222 has 128 divisors (see below), whose sum is σ = 52024896000. Its totient is φ = 6244957440.

The previous prime is 21033102221. The next prime is 21033102241. The reversal of 21033102222 is 22220133012.

It is a super-2 number, since 2×21033102222² (a number of 21 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 = 21033102195 and 21033102204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033102221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13071354 + ... + 13072962.

It is an arithmetic number, because the mean of its divisors is an integer number (406444500).

Almost surely, 2^21033102222 is an apocalyptic number.

21033102222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21033102222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26012448000).

21033102222 is an abundant number, since it is smaller than the sum of its proper divisors (30991793778).

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

21033102222 is a wasteful number, since it uses less digits than its factorization.

21033102222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063 (or 2057 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21033102222 its reverse (22220133012), we get a palindrome (43253235234).

The spelling of 21033102222 in words is "twenty-one billion, thirty-three million, one hundred two thousand, two hundred twenty-two".