2021222112123 has 16 divisors (see below), whose sum is σ = 2696622053760. Its totient is φ = 1346652049344.

The previous prime is 2021222112121. The next prime is 2021222112197. The reversal of 2021222112123 is 3212112221202.

It is not a de Polignac number, because 2021222112123 - 2¹ = 2021222112121 is a prime.

It is a super-2 number, since 2×2021222112123² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2021222112123.

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 in 15 ways as a sum of consecutive naturals, for example, 34775815 + ... + 34833887.

It is an arithmetic number, because the mean of its divisors is an integer number (168538878360).

Almost surely, 2^{2021222112123} is an apocalyptic number.

2021222112123 is a deficient number, since it is larger than the sum of its proper divisors (675399941637).

2021222112123 is a wasteful number, since it uses less digits than its factorization.

2021222112123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65018.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 2021222112123 its reverse (3212112221202), we get a palindrome (5233334333325).

The spelling of 2021222112123 in words is "two trillion, twenty-one billion, two hundred twenty-two million, one hundred twelve thousand, one hundred twenty-three".