20102112221202 has 96 divisors (see below), whose sum is σ = 49059108274176. Its totient is φ = 5893567711200.

The previous prime is 20102112221179. The next prime is 20102112221203. The reversal of 20102112221202 is 20212221120102.

It is a happy number.

20102112221202 is a `hidden beast` number, since 20 + 10 + 211 + 2 + 221 + 202 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (20102112221203) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24161343 + ... + 24979485.

It is an arithmetic number, because the mean of its divisors is an integer number (511032377856).

Almost surely, 2^{20102112221202} is an apocalyptic number.

20102112221202 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 20102112221202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24529554137088).

20102112221202 is an abundant number, since it is smaller than the sum of its proper divisors (28956996052974).

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

20102112221202 is a wasteful number, since it uses less digits than its factorization.

20102112221202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822196 (or 822193 counting only the distinct ones).

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

Adding to 20102112221202 its reverse (20212221120102), we get a palindrome (40314333341304).

The spelling of 20102112221202 in words is "twenty trillion, one hundred two billion, one hundred twelve million, two hundred twenty-one thousand, two hundred two".