20121212200122 has 40 divisors (see below), whose sum is σ = 49185185382432. Its totient is φ = 6097337029800.

The previous prime is 20121212200121. The next prime is 20121212200213. The reversal of 20121212200122 is 22100221212102.

It is a happy number.

20121212200122 is a `hidden beast` number, since 201 + 2 + 121 + 220 + 0 + 122 = 666.

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 = 20121212200095 and 20121212200104.

It is not an unprimeable number, because it can be changed into a prime (20121212200121) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5645680654 + ... + 5645684217.

Almost surely, 2^{20121212200122} is an apocalyptic number.

20121212200122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20121212200122 is an abundant number, since it is smaller than the sum of its proper divisors (29063973182310).

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

20121212200122 is a wasteful number, since it uses less digits than its factorization.

20121212200122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11291364896 (or 11291364887 counting only the distinct ones).

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

Adding to 20121212200122 its reverse (22100221212102), we get a palindrome (42221433412224).

The spelling of 20121212200122 in words is "twenty trillion, one hundred twenty-one billion, two hundred twelve million, two hundred thousand, one hundred twenty-two".