20101212220122 has 32 divisors (see below), whose sum is σ = 48730211444160. Its totient is φ = 6091276430160.

The previous prime is 20101212220121. The next prime is 20101212220127. The reversal of 20101212220122 is 22102221210102.

It is a happy number.

20101212220122 is a `hidden beast` number, since 201 + 0 + 121 + 2 + 220 + 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 = 20101212220095 and 20101212220104.

It is not an unprimeable number, because it can be changed into a prime (20101212220121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16920211713 + ... + 16920212900.

It is an arithmetic number, because the mean of its divisors is an integer number (1522819107630).

Almost surely, 2^{20101212220122} is an apocalyptic number.

20101212220122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20101212220122 is an abundant number, since it is smaller than the sum of its proper divisors (28628999224038).

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

20101212220122 is a wasteful number, since it uses less digits than its factorization.

20101212220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33840424635 (or 33840424629 counting only the distinct ones).

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

Adding to 20101212220122 its reverse (22102221210102), we get a palindrome (42203433430224).

The spelling of 20101212220122 in words is "twenty trillion, one hundred one billion, two hundred twelve million, two hundred twenty thousand, one hundred twenty-two".