20012100022222 has 144 divisors (see below), whose sum is σ = 40331514682368. Its totient is φ = 7276001040000.

The previous prime is 20012100022207. The next prime is 20012100022223. The reversal of 20012100022222 is 22222000121002.

It is a junction number, because it is equal to n+sod(n) for n = 20012100022196 and 20012100022205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012100022223) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 65342347 + ... + 65647897.

It is an arithmetic number, because the mean of its divisors is an integer number (280079963072).

Almost surely, 2^{20012100022222} is an apocalyptic number.

20012100022222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20012100022222 is an abundant number, since it is smaller than the sum of its proper divisors (20319414660146).

20012100022222 is a wasteful number, since it uses less digits than its factorization.

20012100022222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305687 (or 305635 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20012100022222 its reverse (22222000121002), we get a palindrome (42234100143224).

The spelling of 20012100022222 in words is "twenty trillion, twelve billion, one hundred million, twenty-two thousand, two hundred twenty-two".