222222112122021 has 16 divisors (see below), whose sum is σ = 337285735395840. Its totient is φ = 128824412823920.

The previous prime is 222222112121963. The next prime is 222222112122041. The reversal of 222222112122021 is 120221211222222.

It is a happy number.

It is not a de Polignac number, because 222222112122021 - 2¹⁸ = 222222111859877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222222112121982 and 222222112122000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222222112122041) 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, 146391377451 + ... + 146391378968.

It is an arithmetic number, because the mean of its divisors is an integer number (21080358462240).

Almost surely, 2^{222222112122021} is an apocalyptic number.

It is an amenable number.

222222112122021 is a deficient number, since it is larger than the sum of its proper divisors (115063623273819).

222222112122021 is a wasteful number, since it uses less digits than its factorization.

222222112122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292782756456.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 222222112122021 its reverse (120221211222222), we get a palindrome (342443323344243).

The spelling of 222222112122021 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, one hundred twelve million, one hundred twenty-two thousand, twenty-one".