1020121122222 has 32 divisors (see below), whose sum is σ = 2267376883200. Its totient is φ = 339974215704.

The previous prime is 1020121122199. The next prime is 1020121122227. The reversal of 1020121122222 is 2222211210201.

It is a happy number.

1020121122222 is a `hidden beast` number, since 10 + 201 + 211 + 22 + 222 = 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 = 1020121122195 and 1020121122204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020121122227) 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, 1557222 + ... + 2113097.

It is an arithmetic number, because the mean of its divisors is an integer number (70855527600).

Almost surely, 2^{1020121122222} is an apocalyptic number.

1020121122222 is an abundant number, since it is smaller than the sum of its proper divisors (1247255760978).

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

1020121122222 is a wasteful number, since it uses less digits than its factorization.

1020121122222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3675477 (or 3675471 counting only the distinct ones).

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

Adding to 1020121122222 its reverse (2222211210201), we get a palindrome (3242332332423).

The spelling of 1020121122222 in words is "one trillion, twenty billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred twenty-two".