2021222112122 has 4 divisors (see below), whose sum is σ = 3031833168186. Its totient is φ = 1010611056060.

The previous prime is 2021222112121. The next prime is 2021222112197. The reversal of 2021222112122 is 2212112221202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1213630519201 + 807591592921 = 1101649^2 + 898661^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2021222112094 and 2021222112103.

It is not an unprimeable number, because it can be changed into a prime (2021222112121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505305528029 + ... + 505305528032.

Almost surely, 2^{2021222112122} is an apocalyptic number.

2021222112122 is a deficient number, since it is larger than the sum of its proper divisors (1010611056064).

2021222112122 is a wasteful number, since it uses less digits than its factorization.

2021222112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010611056063.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2021222112122 its reverse (2212112221202), we get a palindrome (4233334333324).

The spelling of 2021222112122 in words is "two trillion, twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, one hundred twenty-two".