20122212222 has 24 divisors (see below), whose sum is σ = 49826430576. Its totient is φ = 5749203456.

The previous prime is 20122212203. The next prime is 20122212233. The reversal of 20122212222 is 22221222102.

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 = 20122212195 and 20122212204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79849923 + ... + 79850174.

It is an arithmetic number, because the mean of its divisors is an integer number (2076101274).

Almost surely, 2^20122212222 is an apocalyptic number.

20122212222 is an abundant number, since it is smaller than the sum of its proper divisors (29704218354).

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

20122212222 is a wasteful number, since it uses less digits than its factorization.

20122212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159700112 (or 159700109 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20122212222 its reverse (22221222102), we get a palindrome (42343434324).

It can be divided in two parts, 201222 and 12222, that added together give a square (213444 = 462²).

The spelling of 20122212222 in words is "twenty billion, one hundred twenty-two million, two hundred twelve thousand, two hundred twenty-two".