20122221210102 has 128 divisors (see below), whose sum is σ = 49951313280000. Its totient is φ = 5952527792640.

The previous prime is 20122221210067. The next prime is 20122221210107. The reversal of 20122221210102 is 20101212222102.

It is a happy number.

20122221210102 is a `hidden beast` number, since 201 + 22 + 221 + 210 + 10 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122221210107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4658974 + ... + 7870862.

It is an arithmetic number, because the mean of its divisors is an integer number (390244635000).

Almost surely, 2^{20122221210102} is an apocalyptic number.

20122221210102 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 20122221210102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24975656640000).

20122221210102 is an abundant number, since it is smaller than the sum of its proper divisors (29829092069898).

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

20122221210102 is a wasteful number, since it uses less digits than its factorization.

20122221210102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212163 (or 3212157 counting only the distinct ones).

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

Adding to 20122221210102 its reverse (20101212222102), we get a palindrome (40223433432204).

The spelling of 20122221210102 in words is "twenty trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred ten thousand, one hundred two".