220101212122 has 24 divisors (see below), whose sum is σ = 366487199316. Its totient is φ = 99055440000.

The previous prime is 220101212119. The next prime is 220101212161. The reversal of 220101212122 is 221212101022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 136921460841 + 83179751281 = 370029^2 + 288409^2 .

It is a junction number, because it is equal to n+sod(n) for n = 220101212096 and 220101212105.

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, 4478079 + ... + 4526962.

Almost surely, 2^220101212122 is an apocalyptic number.

220101212122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

220101212122 is a deficient number, since it is larger than the sum of its proper divisors (146385987194).

220101212122 is a wasteful number, since it uses less digits than its factorization.

220101212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9005166 (or 9005155 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 220101212122 its reverse (221212101022), we get a palindrome (441313313144).

Subtracting 220101212122 from its reverse (221212101022), we obtain a square (1110888900 = 33330²).

The spelling of 220101212122 in words is "two hundred twenty billion, one hundred one million, two hundred twelve thousand, one hundred twenty-two".